If your thoughts are confined only to your business, only to your physical welfare, only to the narrow circle of the town in which you live, then you live in a narrow cir-conscribed life.

The changes in material cir-cumstances were enormous, and easy to recognize. But I wanted to understand the deeper changes - in people's thinking, attitudes, lifestyles.

Night VFR and command instrument ratings (CIR) require you to prove your ability to navigate by instruments only.