There is no harm if he finishes college and gets his degree. If possible, he can live in the temple and attend the university daily. At any rate, he should carefully follow all the regulative principles and associate with his fellow devotees as much as possible. The university is well known for demonic association, but if he is able to keep up his devotional practices and protect the creeper of devotional service, then he may complete his degree. I think there is more advantage in Bir Krsna remaining fully engaged in his temple duties than in going back to college. What would be the practical benefit of such degree?
Letter to Bhakta das, 13 April, 1974