The Sanskrit word ‘Sadhu’ is translated into English by the word ‘mendicant’ and very rarely with another word ‘Sage’. But ‘Sadhu’ is differently meant in the revealed scriptures like Srimad Bhagwat Geeta or Srimad Bhagbatam. In the ‘Bhagwat Geeta’ the qualification of a ‘Sadhu’ is based on one’s faithfulness in the transcendental service of the Personality of Godhead. One who is firmly fixed up in the devotional service and nothing more-is called a ‘Sadhu’ and Mahatma in terms of Bhagwat Geeta. Even if a man is apt to some vicious habits which a ‘Sadhu’ must not have as part of his personal qualification, is accepted also as a ‘Sadhu’ for the only qualification of his staunch faithfulness in the service of the Personality of Godhead. Bhagwat Geeta has not nullified all the above mentioned primary twenty six qualifications of a ‘Sadhu’ by the statement-‘even if a man is accustomed to vicious habits.’ The idea is explained in the following shloka in which it is said that such well-settled devotee shall soon be well-qualified with all the pious qualifications of a ‘Sadhu’. But because one has become faithfully fixed up in the service of the Lord-the seed of all godly qualifications is sowed therein and the resultant fortification will come in vogue, without delay. And therefore the primary qualification of a ‘Sadhu’ is that he must be an unflinching devotee of the Lord.