"I am very pleased that you are doing nicely. But don't be proud. Always remain humble, meek, that 'I am nothing. I cannot...' That will be nice. And if you think, 'Now I have become liberated. I can chant and dance,' no, don't think like that. Just like even Caitanya-caritāmṛta author, he says, purīṣera kīṭa haite muñi se laghiṣṭha (CC Adi 5.205): 'I am lower than the worm in the stool.' Jagāi mādhāi haite muñi se pāpiṣṭha: 'I am more sinner than Jagāi-Mādhāi.' In this way... That is not artificial. A Vaiṣṇava must think like that, that 'I am rotten. I have no value.' Don't be proud.
Then the things will go on nicely. And as soon as you become proud, then māyā—'Yes, you are God. Come on. I will kick you on your face. Come on.' (laughter) These rascals becomes God, and the māyā kicks on the face, and they think that they have become God. Don't become like that. Always remain humble servant, and you will be happy."
(Srila Prabhupada Lecture, Detroit, August 3, 1975)