Prabhupāda: My students are within thirties. The oldest student I have got at the present moment, he is twenty-eight years. No, Kirtanananda is about thirty years old. That's all. So, of course, I do not get any older people. That is nice, hopeful, because younger section, if they take it very seriously, then I have hopes that they will preach in future, even in my absence. And old people, if a man becomes too much accustomed to a certain limited habits, in old age it is very difficult to give it up unless one is extraordinarily intelligent.