The fidelity of a dog is a precious gift demanding no less binding moral responsibilities than the friendship of a human being.

In nature we find not only that which is expedient, but also everything which is not so inexpedient as to endanger the existence of the species.

The human mind, in taking us down the path of technocracy, has become the adversary of life itself and collaterally the adversary of the human soul.

Man appears to be the missing link between anthropoid apes and human beings.

Truth in science can be defined as the working hypothesis best suited to open the way to the next better one.

If you confine yourself to this Skinnerian technique, you study nothing but the learning apparatus and you leave out everything that is different in octopi, crustaceans, insects and vertebrates. In other words, you leave out everything that makes a pigeon a pigeon, a rat a rat, a man a man, and, above all, a healthy man healthy and a sick man sick.

The human soul is very much older than the human mind.