If by the grace of Lord Caitanya and the spiritual master a disciple attains the standard of pure devotional service, the spiritual master is very happy. The spiritual master is not actually happy if the disciple brings him money, but when he sees that a disciple is following the regulative principles and advancing in spiritual life, he is very glad and feels obliged to such an advanced disciple.

From Srila Prabhupada’s purport to Cc 1.7.91