Prof. Kirti Bunchua
With the 4 abilities of man, there are power innate in human nature, man has to know them and realize the in order at least to become a Man-for-Himself, and even so he can provide himself the authentic happiness according to reality (AHAR) only by actualizing all the 4 powers.
to be A-Man-for-Himself is already good, but to be A-Man-with-Others in a good harmony is better, to be A-Man-for-Others is without doubt the best , and to be A-Man-for-the-World is really perfect.
So, man is the most wonderful creature in the universe by his understand and do good with these four abilities.