Man can learn nothing unless he proceeds from the known to the unknown. Claude Bernard
Life is difficult for those who have the daring to first set out on an unknown road. The avant-garde always has a bad time of it. Anton Chekhov
Order and simplification are the first steps toward mastery of a subject – the actual enemy is the unknown. Thomas Mann
The difference between what the most and the least learned people know is inexpressibly trivial in relation to that which is unknown. Albert Einstein
Whoever starts out toward the unknown must consent to venture alone. Andre Gide
Only the unknown frightens men. But once a man has faced the unknown, that terror becomes the known. Antoine de Saint-Exupery
There are things known and there are things unknown, and in between are the doors of perception. Aldous Huxley
It is good to love the unknown. Charles Lamb
When you get to the end of all the light you know and it’s time to step into the darkness of the unknown, faith is knowing that one of two things shall happen: either you will be given something solid to stand on, or you will be taught how to fly. Edward Teller
Growth means change and change involves risk, stepping from the known to the unknown. George Shinn
There is nothing that man fears more than the touch of the unknown. He wants to see what is reaching towards him, and to be able to recognize or at least classify it. Man always tends to avoid physical contact with anything strange. Elias Canetti
The mind loves the unknown. It loves images whose meaning is unknown, since the meaning of the mind itself is unknown. Rene Magritte
It is the unknown that excites the ardour of scholars, who, in the known alone, would shrivel up with boredom. Wallace Stevens