My advice to people today is as follows: 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.

Think for yourself and question authority.

We are dealing with the best-educated generation in history. But they've got a brain dressed up with nowhere to go.

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

In the information age, you don't teach philosophy as they did after feudalism. You perform it. If Aristotle were alive today he'd have a talk show.

There are three side effects of acid: enhanced long-term memory, decreased short-term memory, and I forget the third.

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

Turn on, Tune in, Drop out.

The universe is an intelligence test.

I've left specific instructions that I do not want to be brought back during a Republican administration.

Civilization is unbearable, but it is less unbearable at the top.

Learning how to operate a soul figures to take time.

You can always pick up your needle and move to another groove.

Science is all metaphor.

Kansas had better stop raising corn and begin raising hell.

An organized effort is making to deceive the people. There are two great enemies of thought and progress, the aristocracy of royalty and the aristocracy of gold.