Lord Caitanya Mahaprabhu has forecast that this Hare Krsna Mantra will be heard in every nook and cranny of the globe. He is God, so it will happen, that is a fact. So if we take advantage then we may take the credit, but if we do not someone else will. You are right to just depend on Krsna. When He sees that you are sincere He will reveal everything to you.
Letter to Karandhara, 4 November, 1970