Guru Maharaj:  In Kali-yuga, one doesn’t get a reaction for mentally creating some offence. You have to do that practically. Since the mind is not very easily controlled in the Kali-yuga, it may think many weird things. So Gadādhara Prabhu, He was thinking that Puṇḍarīka Vidyānidhī was a materialistic, later He realized that he was a pure devotee. So therefore, He accepted him as His guru, because the guru always forgives his disciples’ offences. So, if someone offends a guru mentally, and later surrenders and becomes the guru’s disciple, that is authorized in the process, example set by Gadādhara Prabhu.