Fashion is fortunately no law but to its devotees.

I never found even in my juvenile hours that it was necessary to go a thousand miles in search of themes for moralizing.

The whole secret of life is to be interested in one thing profoundly and in a thousand things well.

In all science, error precedes the truth, and it is better it should go first than last.

Life is a comedy for those who think and a tragedy for those who feel.

The Methodists love your big sinners, as proper subjects to work upon.

This world is a comedy to those that think, a tragedy to those that feel.

Nine-tenths of the people were created so you would want to be with the other tenth.

Who has begun has half done. Have the courage to be wise. Begin!

Foolish writers and readers are created for each other.

When people will not weed their own minds, they are apt to be overrun by nettles.

This book is for those of you who are tired of trying to squeeze into constrained categories, who long for a life without limits on who you are or who you will become.

A well-lived day is medicine unto itself.

Smog is affecting larger parts of China, and environmental pollution has become a major problem, which is nature's red-light warning against the model of inefficient and blind development.

There’s a crack (or cracks) in everyone…that’s how the light of God gets in.

There is nothing more dreadful than the habit of doubt. Doubt separates people. It is a poison that disintegrates friendships and breaks up pleasant.

Just selling through a movie theater is not ever going to be a viable way to make money back on a movie anymore.

You'll regret this, and you may regret this a lot sooner than you think.

Science is the art of the solvable.

And what causes fear? Ignorance of our own nature.