Sadhu : Who gives if asked for or not even ask but shows his/her desire
        i.e. one who looking god in every one came before him.
Sant  : Who is nothing to give. But glory he has because of his wisdom.

Rushi : One who teaches after glory. Ways & Means to survive.

Muni  : Who dictate his philosophy for reason to one who approaches.

Journalist Sharad Borkar (Motivator)