If I am fool it is at least a doubting one and I envy no one the certainty of his self-approved wisdom.

From principles is derived probability but truth or certainty is obtained only from facts.

Truth is confirmed by inspection and delay falsehood by haste and uncertainty.

I trust every single person around me and if I feel even a whiff of uncertainty I won't have that person around me.

If you just watch a teenager you see a lot of uncertainty.

The novelist must look on humanity without partiality or prejudice. His sympathy like that of the historian must be unbounded and untainted by sect or party.

To many a man and sometimes to a youth there comes the opportunity to choose between honorable competence and tainted wealth. The young man who starts out to be poor and honorable holds in his hand one of the strongest elements of success.

Read the news section of the newspaper and there is confusion and uncertainty a world buffeted by large forces people neither understand nor control. But turn to the sports section and it's all different.

Science has proof without any certainty. Creationists have certainty without any proof.

Adventure upon all the tickets in the lottery and you lose for certain and the greater the number of your tickets the nearer your approach to this certainty.