i was given the criterion edition of the thin red line for christmas and i have to say it was a revelation, and forced me to reappraise malick. i saw it around when it first came out ('98?), but remembered almost nothing about it (except it was made after a 20 year hiatus removed from days of heaven, his second movie after badlands), and the little i remember of my reaction to it at that time, was that it didn't really stand out. i had later seen badlands on the recommendation of a film critic i respect, and was impressed (the signature nature shots and voice overs already a fully formed part of his style even in his debut). i saw days of heaven, but not sure if i saw the whole thing (maybe caught part of it on TV?), but didn't remember a lot of that either, though had a vague recollection that it had garnered a lot of critical acclaim for its cinematography (winning an oscar, in fact)... i had not, at the time of rewatching TRL, seen or even heard of new world or tree of life, though i saw both a few days later... i'll be watching days of heaven and badlands again within the next week or so (and may note my impressions then)...
criterion is my favorite collection, and i read the enclosed booklet of TRL early christmas morning. there was an incisive opening essay by somebody who's title was chairman of the national society of film critics... the second article was by james jones (who wrote the novel this movie was based on... his first novel, from here to eternity, won the national book award and was also made into a movie, winning frank sinatra an oscar and relaunching a singing/acting career that had been on the skids), about how nearly all war movies were fake (i think he may have had some praise for the classic all quiet on the western front shot in 1930)... jones was stationed in pearl harbor during the bombing (the setting of from here to eternity), and fought briefly on guadalacanal (the setting of TRL), the largest of the solomon islands, and strategically close to australia. the scene of a brutal six month campaign, it was i think the first instance where the US took back land from the japanese, involved the capture of an air field which strengthened our position on land, sea and air for a thousand miles in every direction, and was by some accounts, along with the victory at midway, one of the major turning points in the south pacific theater...
though i didn't start watching until about 4:30 AM, i was enthralled (especially the centerpiece battle that takes place on the hill) and couldn't turn it off (ten minutes shy of three hours?)... maybe this was a case of watching a movie years later and experiencing it differently because the VIEWER has changed...

i thought it was one of the best war movies i've ever seen, maybe the best (i still think apocalypse now was brilliant, though perhaps more stylized)...
watched tree of life a few days later... i'll have to rewatch this, and since my take on TRL changed so drastically, that could happen again... my initial impression was that there were moments of brilliance and even genius in tree of life... perhaps because it reportedly had segments for a decade/s long project called Q about the origins of life interwoven through the ostensibly autobiographical coming of age in texas story arc (malick, who zealously guards his privacy like maybe no other director, may have had a demanding father, and lost a musically gifted brother to suicide), i found TRL overall to be a more satisfying cinematic experience as a WHOLE... that said, i think i would be missing the point to say tree of life suffers in the comparison with TRL by being less COHESIVE...
as a disclaimer, i would characterize myself as being comfortable with open ended movies where you aren't force fed what to think or feel (bloom alluded to this upthread)... i am really looking forward to experiencing days of heaven immersive criterion style, but am already expecting a TRL-style revelation/conversion experience... after not really previously according malick a high rank in my personal pantheon of living directors, i am starting to think he may be one of our greatest living directors (not quite prepared to put him up with kurosawa just yet)... i get that he is not for everybody... i do like a lot the languid pace and unfolding, the stunning interwoven imagery and the voice overs (which are NOT, imo, of the lazy writing plot advancement school, but more akin to a vital poetic partner in an overall audio-visual marriage of image, word and music)... one reason i like film so much, and that it may be the quintessential 20th/21st-century art form, is that it incorporates all the arts into its collective body of work... like music and unlike a painting, it unfolds in time and can allow one to witness development, but it contains these arts and many more (theater, architecture, acting, literature, etc)... in the hands of a master like malick, who brings to bear a formidable, eclectic and atypical film making tool kit, if you are prepared to let the images, words and sounds wash over you, a potent cinematic experience could be the reward...
i found his resume very interesting, arriving circuitously to film in general and directing specifically... he graduated summa cum laude from harvard in philosophy, was a rhodes scholar at oxford (though emerged without a doctorate), published a translation by the german philosopher heidegger, and later taught at MIT while freelancing as a jounalist.
he shot something like a million feet of film for TRL, and allows his films to take shape in post production... it took three editors a year and a half to finish (days of heaven may have been two years in post?)... part of the evolution of malick's vision of how TRL should ultimately take shape involved paring down the initially planned adrian brody's feature role to virtually nothing (mentioned upthread), and making (then) newcomer jim caviezel the focal point... personally, i found this to be an inspired choice... part of the process meant that actors such as john c. reilly and jared leto had diminished roles, john travolta and george clooney were relegated to cameo status, and gary oldman, mickey rourke, viggo mortensen and bill pullman filmed scenes that were cut from the finished work... many, many front line actors were interested in this project that didn't make it as far into the project as the above mentioned ones (malick evidently enjoys immense respect from the cinematic community/cognoscenti)...
i also thought it was interesting that composer hans zimmer (eight oscar nominations?) mentioned he and malick hit it off creatively and malick moved in with him something like a year BEFORE principal filming began, inspiring an audio-visual collaboration between director and composer that may be unprecedented in film history (?)... zimmer's score, BTW, imo, was great in its understated nature... in the beginning of the film (at least in its criterion incarnation), a message from malick recommends that the film is best viewed LOUD!

i can attest that this can allow for a more immersive experience...
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ebert's review of tree of life, where he surprisingly likened some aspects (the cosmic scope) to 2001... special effects wizard douglas trumbull, who worked with kubrick on 2001, was involved in this project...
http://rogerebert.suntimes.com/apps/pbcs.dll/article?AID=/20110602/REVIEWS/110609998
the criterion essay on TRL (wish i could have found the war movies are fake article by source material novelist james jones)... HIGHLY recommended if you think you might be interested in this movie, or in rewatching it...
http://www.criterion.com/current/posts/1603-the-thin-red-line-this-side-of-paradise
a site i like for their blu ray reviews, high-def digest, called the TRL blu ray not just ONE OF the best, but the greatest high def transfer they ever reviewed and a new benchmark (at least, up to that point... dated 9-28-2010)... high praise, and they definitely don't say that about every new release that comes down the pike...
http://bluray.highdefdigest.com/3385/thethinredline.html
the review of days of heaven from the same site as immediately above...
http://bluray.highdefdigest.com/2900/daysofheaven.html
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i would love to see a "malick-ized" mash up of the kardashians complete with voice over... "where does this evil come from... how did we get so stupid?"