... much seemingly chance variation in human behavior is not due to chance; it is in fact the logical result of a few basic, observable differences in mental functioning.

Although intelligence tests are usually speed tests for the sake of convenience, it is debatable whether speed has any rightful place in the basic concept of intelligence.

By developing individual strengths, guarding against weaknesses, and appreciating the strengths of other types, life will be more amusing, more interesting, and more of a daily adventure than it could possibly be if everyone were alike.

Introverted feeling types have a wealth of warmth and enthusiasm, but they may not show it until they know someone well. They wear their warm side inside, like a fur-lined coat.

They [INTJs] are likely, however, to organize themselves out of a job. They cannot continually reorganize the same thing, and a finished product has no more interest. Thus, they need successive new assignments, with bigger and better problems, to stretch their powers.

The visions of the INFJs tend to concern human welfare, and their contributions are likely to be made independent of a mass movement.

Extraverts ... cannot understand life until they have lived it. Introverts ... cannot live life until they understand it.