A thing is important if anyone think it important.

Marvelous as may be the power of my dog to understand my moods, deathless as his affection and fidelity, his mental state is as unsolved a mystery to me as it was to my remotest ancestor.

The greatest weapon we have to combat stress is the ability to choose our thoughts.

We have to live today by what truth we can get today and be ready tomorrow to call it falsehood.

As there is no worse lie than a truth misunderstood by those who hear it, so reasonable arguments, challenges to magnanimity, and appeals to sympathy or justice, are folly when we are dealing with human crocodiles and boa-constrictors.

To consider hypotheses is surely always better than to dogmatize ins blaue hinein

To know one thing thoroughly would be to know the universe.