Perfect as the wing of a bird may be, it will never enable the bird to fly.

Never think that you already know all. However highly you are appraised, always have the courage to say to yourself-I am ignorant.

Don't become a mere recorder of facts, but try to penetrate the mystery of their origin.

When the dog is repeatedly teased with the sight of objects inducing salivary secretion from a distance, the reaction of the salivary glands grows weaker and weaker and finally drops to zero.

Science demands from a man all his life. If you had two lives that would not be enough for you. Be passionate in your work and in your searching.

While you are experimenting, do not remain content with the surface of things.

Men are apt to be much more influenced by words than by the actual facts of the surrounding reality

Perfect as the wing of a bird may be, it will never enable the bird to fly if unsupported by the air. Facts are the air of science. Without them a man of science can never rise.

Appetite, craving for food, is a constant and powerful stimulator of the gastric glands.

It is still open to question whether psychology is a natural science, or whether it can be regarded as a science at all.

School yourself to demureness and patience. Learn to inure yourself to drudgery in science. Learn, compare, collect the facts.

Love is a powerful thing. More powerful, even, than money.

They're the first crew I've ever had and most of them even call me Captain. I'm going to miss them.

The worst cynicism a belief in luck.

I'm oftentimes called away from my family... it's rather hard for me to be away from them. We're very close.

The main problem with pacifism is that it doesn’t work in all situations. The main problem with pacifists is that they’re convinced it does.

the tentacles of today reach out like an octopus to swallow yesterday.

We're not going to apologize for acting like a good football team.

I'm so excited about the new [Yankee] stadium!

Perhaps the way with any obsession is to ignore it simply. Not to fight it, since it draws strength from any contact with us, whether hostile or friendly.

Most of the books call Her a He, but I am able to ascertain what is meant, despite that semantic error.