Pl.note that I am leading earner but not earning leader.

One has to learn all 6000 streams of knowledge in academic life.
After learning,one has to know that he/she can't practise all 6000 streams of knowledge in real life. 
So by knowing limitations of doing,directing and upholding,one has to confine his time to two or three professions.
I confined myself to writing public messages and guiding people.
Pl.note.