Logic will get you from A to Z, imagination will get you everywhere.

Life is like riding a bicycle. To keep your balance, you must keep moving.

Anyone who has never made a mistake has never tried anything new.

A clever person solves a problem. A wise person avoids it.

Insanity is doing the same thing over and over again and expecting different results.

Question everything.

Reality is merely an illusion.

Only a life lived for others is a life worthwhile.

Once we accept our limits, we go beyond them.