The quality of life is determined by its activities.

Quality is not an act, it is a habit.

Persistence is the twin sister of excellence. One is a matter of quality; the other, a matter of time.

Men acquire a particular quality by constantly acting in a particular way.

Courage is the first of human qualities because it is the quality which guarantees the others.

Men acquire a particular quality by constantly acting a particular way. You become just by performing just actions, temperate by performing temperate actions, brave by performing brave actions.