Let everything you do be done as if it makes a difference.

Whenever you're in conflict with someone, there is one factor that can make the difference between damaging your relationship and deepening it. That factor is attitude.

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

The art of remembering is the art of thinking. When we wish to fix a new thing in either our own mind or a pupil's, our conscious effort should not be so much to impress and retain it as to connect it with something else already there. The connecting is the thinking; and, if we attend clearly to the connection, the connected thing will certainly be likely to remain within recall.

Truth happens to an idea

Men habitually use only a small part of the power which they actually possess.

Let everything you do be done as if it makes a difference.