You're only as young as the last time you changed your mind.

Think for yourself and question authority

The universe is an intelligence test

If you take the game of life seriously, if you take your nervous system seriously, if you take your sense organs seriously, if you take the energy process seriously, you must turn on, tune in, and drop out

If you don't like what you're doing, you can always pick up your needle and move to another groove.

I declare that The Beatles are mutants. Prototypes of evolutionary agents sent by God, endowed with a mysterious power to create a new human species, a young race of laughing freemen.