Religion is based on dogma and belief, whereas science is based on doubt and questioning.

If the history of science shows us anything, it is that we get nowhere by labeling our ignorance “God”.

Faith is a padlock of the mind, and few keys can open it.

If the history of science teaches us anything, it is that what conquers our ignorance is research, not giving up and attributing our ignorance to the miraculous work of a creator.

We don't have faith in reason; we use reason because, unlike revelation, it produces results and understanding. Even discussing why we should use reason employs reason!

In religion, faith is a virtue. In science, faith is a vice.

Damn, but science is just a constant feed of cool new facts and theories. Theology doesn't come close.

Can a geology teacher blithely tell his students that the earth is flat, or a European history professor that the Holocaust didn't happen? That's not academic freedom, but dereliction of duty.

Evolution tells us where we came from, not where we can go.

We now have many of the answers that once eluded Darwin, thanks to two developments that he could not have imagined: continental drift and molecular taxonomy.

All scientific progress requires a climate of strong skepticism.

Perhaps it's no coincidence that the word words is an anagram of sword. Well-used words cut through ambiguity and confusion like a sharp sword in the hands of an expert swordsman.

Books are like our children. They are often conceived by inspiration, but are born only by labor.

Development does not take place in Washington, DC. Development takes place in the rest of the world.

Nothing soothes me more after a long and maddening course of pianoforte recitals than to sit and have my teeth drilled.

Men do not know how to appreciate and measure luck except that of others. Their own never.

Take your dreams and the promises God has put in your heart, and every day declare that they will come to pass.

What has been doing in the last week, attacking Hollywood actresses [Meryl Streep] for criticizing him, I mean what would is this guy [Donald Trump] living in?

There's nothing wrong with being a genius who can fascinate the young. Rather, there's something wrong with the young who can't be fascinated by a genius.

Any society, any nation, is judged on the basis of how it treats its weakest members - the last, the least, the littlest.

Pictures were made to entertain; if you want to send a message, call Western Union.