Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.Stephen Hawking
Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.Stephen Hawking
Theoretical physics is one of the few fields in which being disabled is no handicap - it is all in the mind.Stephen Hawking
There is a fountain of youth: it is your mind, your talents, the creativity you bring to your life and the lives of people you love. When you learn to tap this source, you will truly have defeated age.Sophia Loren