Pradyumna: "A pure devotee of the Lord automatically develops all godly qualities, and some of the prominent features of those qualities are as follows: He is kind, peaceful, truthful, equable, faultless, magnanimous, mild, clean, nonpossessive, a well-wisher to all, satisfied, surrendered to Kṛṣṇa, without hankering, simple, fixed, self-controlled, a balanced eater, sane, mannerly, prideless, grave, sympathetic, friendly, poetic, expert, and silent. Out of these twenty-six prominent features..."
Prabhupāda: So with the advancement of our spiritual consciousness, Kṛṣṇa consciousness, we should verify "Whether these qualifications are becoming manifest in my person." Just like when you eat, you understand that you are getting strength, or your appetite is being satisfied. Nobody can... Nobody requires to ask certificate. You can understand, yourself. Bhaktiḥ pareśānubhavo viraktir anyatra syāt (SB 11.2.42). If we are advancing in Kṛṣṇa consciousness, then our detachment for material things will, attachment for material things will decrease. This is one side. Viraktir anyatra syāt. Just like our students, they have become averse to so many things. You are all young boys and girls. So many young boys and girls are going to restaurant, to cinema, and so many other things, but you have become detached; you have no more attraction. So one side... Progress of bhakti means one side we shall be detached and another side we shall increase our attachment. So these are the qualifications.