“Every man is the sum total of his reactions to experience. As your experiences differ and multiply, you become a different man, and hence your perspective changes.”
This one gets a little deep, but it’s worth it.
The site Tranquil Monkey has published a letter Hunter S. Thompson wrote before he was successful, offering advice to a friend who was trying to figure out the meaning and purpose of life.
Thompson ultimately concludes that “it is not necessary to accept the choices handed down to you by life as you know it.”