In its amplest meaning history includes every trace and vestige of everything that man has done or thought since first he appeared on the earth. It m… - James Harvey Robinson

It is impossible to divide the past into distinct, clearly defined periods and prove that one age ended and another began in a particular year, such as 476, or 1453, or 1789. Men do not and cannot change their habits and ways of doing things all at once, no matter what happens.

It is a poor technic when attempting to convert one's neighbor to attack his beliefs directly, especially those of the sacred variety. We may flatter ourselves that we are undermining them by our potent reasoning only to find that we have shored them up so that they are firmer than ever. Often history will work where nothing else will. It very gently modifies one's attitude. Refutations are weak compared with its mild but potent operation. To become historically-minded is to be grown-up.

This tendency of mankind to do, in general, this year what it did last, in spite of changes in some one department of life, — such as substituting a president for a king, traveling by rail instead of on horseback, or getting the news from a newspaper instead of from a neighbor, — results in what is called the unity or continuity of history. The truth that no abrupt change has ever taken place in all the customs of a people, and that it cannot, in the nature of things, take place, is perhaps the most fundamental lesson that history teaches. Historians sometimes seem to forget this principle, when they claim to begin and end their books at precise dates.