Without some such education, widely as its details may vary, there can be no real living of the spiritual life.
"A going out into the life of sense Prevented the exercise of earnest realization."[88] Psychologists sometimes divide men into the two extreme classes of extroverts and introverts.

The extrovert is the typical active; always leaning out of the window and setting up contacts with the outside world.

His thinking is mainly realistic.

That is to say, it deals with the data of sense.

The introvert is the typical contemplative, predominantly interested in the inner world.