My major preoccupation is the question, 'What is reality?'

Don't open your mouth, and your physiognomy demonstrates a preoccupation.

It is preoccupation with possession, more than anything else, that prevents men from living freely and nobly.

Most of the confidences were unsought — frequently I have feigned sleep, preoccupation, or a hostile levity when I realized by some unmistakable sign that an intimate revelation was quivering on the horizon; for the intimate revelations of young men, or at least the terms in which they express them, are usually plagiaristic and marred by obvious suppressions.

Preoccupation with sex is the basis of all mental activity.

Sami had a strange preoccupation.