"If you would be a real seeker after truth, it is necessary that at least once in your life you doubt, as far as possible, all things."
- Rene Descartes
"I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth."
- Umberto Eco
"Believe those who are seeking truth, doubt those who find it."
- Gide, Andre
The beginning of wisdom is found in doubting; by doubting we come to the question, and by seeking we may come upon the truth.
- Pierre Abelard
"The only limit to our realization of tomorrow will be our doubts of today."
- Franklin Delano Roosevelt
"You may be deceived if you trust too much, but you will live in torment if you don't trust enough."
- Frank Crane
"Don't waste life in doubts and fears; spend yourself on the work before you, well assured that the right performance of this hour's duties will be the best preparation for the hours and ages that will follow it."
- Ralph Waldo Emerson (now there's some advice I should really take!!!)
"There are two ways to slide easily through life: to believe everything or to doubt everything; both ways save us from thinking."
- Theodore Rubin
"If you're not confused, you're not paying attention."
- Tom Peters
"Nobody is more dangerous than he who imagines himself pure in heart, for his purity, by definition, is unassailable."
- James Baldwin
Everything is vague to a degree you do not realize till you have tried to make it precise.
- Bertrand Russell
"The only thing that makes life possible is permanent, intolerable uncertainty; not knowing what comes next."
- Ursula K. LeGuin