I am very glad to learn also that you are feeling joy while chanting the mantra Hare Krishna. Yes, it is exactly like this. If anyone chants this mantra in good faith and in simple understanding, then surely this transcendental vibration will act immediately in spiritual bliss. Please therefore continue to chant this mantra as many times as possible throughout the day and night. I do not think there is any inconvenience or loss on your part if you do so all the time.
Letter to Sriman Minoru and Kenji, 22 April, 1970