Which one of these four quotes is attributed to Kurt Lewin?
→ The weak can never forgive. Forgiveness is the attribute of the strong.
→ You may be disappointed if you fail, but you are doomed if you don't try.
→ Oh, what a tangled web do parents weave when they think that their children are naive.
→ A successful individual typically sets his next goal somewhat but not too much above his last achievement. In this way he steadily raises his level of aspiration.