from the link, i think it's on the right lines. Gandhi would have been a good advocate, had he not been a leader of men, if you get my meaning.
The Sanskrit terms sādhu ("good man") and sādhvī ("good woman") refer to renouncers who have chosen to live a life apart from or on the edges of society to focus on their own spiritual practice.[1]
The words come from the Sanskrit root sādh, which means "reach one's goal", "make straight", or "gain power over".[2] The same root is used in the word sādhana, which means "spiritual practice". 'Sadhu' can also be used as Vidhyartha, meaning 'let good happen'.