So far as mixing with society, we can do it. That is all right. But simply for jobs sake, we cannot. To mix with them intimately is not good. So that should be avoided. Lord Caitanya never said stop mixing with nondevotees. He was preaching himself. How a preacher can stop? The whole world is nondevotees.
Letter to Vrndavana Candra, 23 July, 1971