كتاب الشخصية المتكاملة

We can not judge personality traits from the external aspect, but we must take an analytical view of personality traits and their dimensions, such as the existence of a deficiency or inability to withstand adversity and others.
The feature is a relatively constant readiness for a particular type of behavior, which appears to have an effect in many situations. For example, perseverance is the willingness to continue to work despite its difficulty, and control is a willingness and a tendency to control and to emerge permanently. The attribute may change as needed for a certain behavior, but this does not negate the person. A quiet man may be at work in his home, but this does not negate the aggressive character.