It is impossible to speak in such a way that you cannot be misunderstood.

True ignorance is not the absence of knowledge, but the refusal to acquire it.

The growth of knowledge depends entirely upon disagreement.

In so far as a scientific statement speaks about reality, it must be falsifiable; and in so far as it is not falsifiable, it does not speak about reality.

The question is not how to get good people to rule; THE QUESTION IS: HOW TO STOP THE POWERFUL from doing as much damage as they can to us.

If you can't say it simply and clearly, keep quiet, and keep working on it till you can.

The best thing that can happen to a human being us to find a problem, to fall in love with that problem, and to live trying to solve that problem, unless another problem even more lovable appears.

Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride, or laziness of mind.

A theory which is not refutable by any conceivable event is non-scientific. Irrefutability is not a virtue of a theory (as people often think) but a vice.

I may be wrong and you may be right, and by an effort, we may get nearer to the truth

The attempt to make heaven on earth invariably produces hell.

People don't resist change. They resist being changed.

Why is it a man can never seem to buckle down and train himself to indolence and stupidity when he can see what sanctuary they offer from toil and pain?

Prosperity comes only through hard work

Libraries are congenial places but unfortunately none of us like these places because we hates books and books are leading us to better direction.

You could be married and bored or single and lonely. Ain't no happiness nowhere.

A tiny hole can empty a great big bucket.

Learn from the past, set vivid, detailed goals for the future,and live in the only moment of time over which you have any control: now.

Believe in the holy contour of life.

A team aligned behind a vision will move mountains. Sell them on your roadmap and don't compromise - care about the details, the fit and finish.

We live in an unsafe world.