The devil's happy when the critics run you off.

Peaceful disputes are maintained when men sincerely believe that they are morally, logically correct about the issues at hand. It is when neither side is really certain that wars are instigated.

I imagine that the intelligent people are the ones so intelligent that they don't even need or want to look 'intelligent' anymore.

I always make sure that the world will prove me right. It gives me the freedom to contradict myself.

In God's eyes, a man who teaches one truth and nothing else is more righteous than a man who teaches a million truths and one lie.

It is debatable whether blind faith is truly faith at all. Faith is the perceptive gray area where scientific facts meet an individual's experiential truths - the extreme of the former is left feeling in the dark whereas the latter is caught blinded by the light. By proper scientific method, it is intellectually dishonest for me to declare the existence of God with utmost certainty, but to my individual spirit, I would be intellectually dishonest to deny the existence of God even for a second. This leaves the best of both worlds, as the believer is called to be able to give reasons for his faith, a deviation from mere fantasy.

To be absolutely certain about something, one must know everything or nothing about it.

In a universe of ambiguity, this kind of certainty comes only once, and never again, no matter how many lifetimes you live.

It is the dull man who is always sure, and the sure man who is always dull. The more a man dreams, the less he believes.

There is only one thing about which I am certain, and this is that there is very little about which one can be certain.

Every area of trouble gives out a ray of hope, and the one unchangeable certainty is that nothing is certain or unchangeable.

A reasonable probability is the only certainty.

Certainty generally is illusion, and repose is not the destiny of man.

To have his path made clear for him is the aspiration of every human being in our beclouded and tempestuous existence.

There is one thing certain, namely, that we can have nothing certain; therefore it is not certain that we can have nothing certain.

Oh! let us never, never doubt What nobody is sure about!

Certainties are arrived at only on foot.

I try not to guess.

The only thing that makes life possible is permanent, intolerable uncertainty; not knowing what comes next.

The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.