Into the Wild

The true story of Chistopher McCandless
directed & screenplay by Sean Penn

Imdb:
After graduating from Emory University, top student and athlete Christopher McCandless abandons his possessions, gave his entire $24,000 savings account to charity and hitchhiked to Alaska to live in the wilderness. Along the way, Christopher encounters a series of characters that shape his life.

Here is a great page with excellent quotes from the movie:

"Mr. Franz I think careers are a 20th century invention and I don't want one."

"I read somewhere... how important it is in life not necessarily to be strong... but to feel strong."

"The core of mans' spirit comes from new experiences."

"So many people live within unhappy circumstances and yet will not take the initiative to change their situation because they are conditioned to a life of security, conformity, and conservatism, all of which may appear to give one peace of mind, but in reality nothing is more dangerous to the adventurous spirit within a man than a secure future. The very basic core of a man's living spirit is his passion for adventure. The joy of life comes from our encounters with new experiences, and hence there is no greater joy than to have an endlessly changing horizon, for each day to have a new and different sun."

"If you want something in life, reach out and grab it."

Into the Wild - Trailer

"Rather than love, than money, than faith, than fame, than fairness... give me truth." (expanded on the original quote by Henry David Thoreau)

"Two years he walks the earth.
No phone, no pool, no pets, no cigarettes. Ultimate freedom. An extremist. An aesthetic voyager whose home is the road. Escaped from Atlanta. Thou shalt not return, 'cause "the West is the best." And now after two rambling years comes the final and greatest adventure. The climactic battle to kill the false being within and victoriously conclude the spiritual pilgrimage. Ten days and nights of freight trains and hitchhiking bring him to the Great White North. No longer to be poisoned by civilization he flees, and walks alone upon the land to become lost in the wild."