If everyone is thinking alike, then somebody isn't thinking.

Where the senses fail us, reason must step in.

There is as much greatness of mind in acknowledging a good turn, as in doing it.

There is one thing stronger than all the armies in the world; and that is an idea whose time has come.

If you want material prosperity, you must first think prosperity thoughts, and then make a habit of doing so, for the thing that keeps most people poor is the sheer habit of poverty thinking.

I have no desire to suffer twice, in reality and then in retrospect.

Be the witness of your thoughts. You are what observes, not what you observe.

Appearances to the mind are of four kinds. Things either are what they appear to be; or they neither are, nor appear to be; or they are, and do not appear to be; or they are not, and yet appear to be. Rightly to aim in all these cases is the wise man’s task.

The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.