One must verify or expel his doubts, and convert them into the certainty of Yes or NO.
Only a very bad theologian would confuse the certainty that follows revelation with the truths that are revealed. They are entirely different things.
We can say with certainty - or 90% probability - that the new industries that are about to be born will have nothing to do with information.
To counter the avoidance of intellectual challenge and responsibility, we must reduce the domination of certainty in education.
When prayer removes distrust and doubt and enters the field of mental certainty, it becomes faith; and the universe is built on faith.
I'm a scientist, not a theologian. I don't know if there is a God or not. Religion requires certainty.
To teach how to live without certainty and yet without being paralysed by hesitation is perhaps the chief thing that philosophy, in our age, can do for those who study it.
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.
Beauty is desired in order that it may be befouled; not for its own sake, but for the joy brought by the certainty of profaning it.
If I knew for a certainty that a man was coming to my house with the conscious design of doing me good, I should run for my life.
It has become a certainty now that if you will only advertise sufficiently you may make a fortune by selling anything.
I think that feeling that if one believed absolutely in any cause, then one must have the confidence, the self-certainty, to go through with that particular course of action.
Mystery is gone to the certainty of technological principles. So the real terror, the real aggression against life comes in the form of the pursuit of our technological happiness.
When we deal with questions relating to principles of law and their applications, we do not suddenly rise into a stratosphere of icy certainty.
I never imagined it wouldn't work out for me. I had that absolute certainty in myself that has seen me through, I think, and my parents were absolutely behind me all the way.
As a painter today you have to work without that essential platform. But if one does not deceive oneself and accepts this lack of certainty, other things may come into play.
When I tested for Billy Budd, I had that kind of confidence that comes with the certainty that you're not going to get something. I was very rough around the edges.
Certitude is not the test of certainty.
When the human mind exists in the light of reason and no more than reason, we may say with absolute certainty that Man and all that made him will be in that instant gone.
We have to be mindful that there is the certainty that terrorists will attempt to launch multiple attacks against their enemy, which is us and our allies.
Could we have prevented in 100% certainty? I don't think anything is that certain. However, we would have had a very, very good chance for preventing it.
In the midst of the flurry - clarity. In the midst of the storm - calm. In the midst of divided interests - certainty. In the many roads - a certain choice.
...while the individual man is an insoluble puzzle, in the aggregate he becomes a mathematical certainty.
There are no means of attaining faith and certainty except through the Qur'an.
I then began to study arithmetical questions without any great apparent result, and without suspecting that they could have the least connexion with my previous researches. Disgusted at my want of success, I went away to spend a few days at the seaside, and thought of entirely different things. One day, as I was walking on the cliff, the idea came to me, again with the same characteristics of conciseness, suddenness, and immediate certainty, that arithmetical transformations of indefinite ternary quadratic forms are identical with those of non-Euclidian geometry.
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