It is the mark of an educated mind to expect that amount of exactness which the nature of the particular subject admits. It is equally unreasonable to accept merely probable conclusions from a mathematician and to demand strict demonstration from an orator.

The true nature of a thing is the highest it can become.

Inferiors revolt in order that they may be equal, and equals that they may be superior. Such is the state of mind which creates revolutions.

Rhetoric may be defined as the faculty of observing in any given case the available means of persuasion.

How many a dispute could have been deflated into a single paragraph if the disputants had dared to define their terms

The line has magnitude in one way, the plane in two ways, and the solid in three ways, and beyond these there is no other magnitude because the three are all.

It is not easy for a person to do any great harm when his tenure of office is short, whereas long possession begets tyranny.