When you cannot answer a skeptic, be content to wait for more light; but never forsake a great principle.

Extreme orthodoxy betrays by its very frenzy that the poison of skepticism has entered the soul of the church; for men insist most vehemently upon their certainties when their hold upon them has been shaken. Frantic orthodoxy is a method for obscuring doubt.

I’ve encountered a lot of people who sound like critics but very few who have substantive criticisms. There is a lot of skepticism, but it seems to be more a matter of inertia than it is of people having some real reason for thinking something else.

Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong. All human progress, even in morals, has been the work of men who have doubted the current moral values, not of men who have whooped them up and tried to enforce them. The truly civilized man is always skeptical and tolerant, in this field as in all others. His culture is based on “I am not too sure.

I think it’s highly likely that we’ll continue to have high-performance graphics capability in living rooms. I’m not sure we’re all going to put down our game controllers and pick up touch screens – which is a reasonable view, I’m just not sure I buy into it

There is no harm in doubt and skepticism, for it is through these that new discoveries are made.

While they were saying among themselves it cannot be done, it was done.

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

If we are not able to ask skeptical questions, to interrogate those who tell us that something is true, to be skeptical of those in authority, then, we are up for grabs for the next charlatan (political or religious) who comes rambling along.

Extreme skepticism and extreme gullibility are two equal ways of not having to think at all. And I don’t think I’m the first to say that.