April 25 1972 Tokyo
The Mahamantra was given to Narada by Brahma. Other mantras made by ordinary men are not authorized by the Sastras, so they have only proportionate effect as much as they are authorized or unauthorized. Highest benefit is from the Mahamantra, or Hare Krishna Mantra, because this is said by authorities. You know these things, you are becoming strong yourself by chanting this mantra, so actually it is so. Compare what you were before to what you have become, now challenge any other mantra to produce such effect. You know it, now try to realize it yourself and convince others, that is Krishna Consciousness. Yes, the more one surrenders, the more he is enabled by the Spiritual Master to succeed.
Hoping this will meet you in good health and happy mood.
April 27 1976 NZ
They think, "Hare Kṛṣṇa movement is disturbing." A rascal civilization. So let us try our best. What can be done? You also helping in this movement. So don't spoil the movement by manufacturing ideas. Don't do that. Go on in the standard way, keep yourself pure; then movement is sure to be successful. But if you want to spoil it by whimsical, then what can be done? It will be spoiled. If you manufacture whims and disagree and fight amongst yourself, then it will be another edition of these so-called movements. It will lose the spiritual strength. Always remember it. You cannot.... Now, actually, people are surprised: "What this Hare Kṛṣṇa mantra has got power that it is changing so quickly?" And on the other hand, it is to be admitted, unless it has got power, how it is changing? So we have to keep that power. Don't make it an ordinary musical vibration. It is a different thing, spiritual. Although it seems like musical vibration, but it is spiritual, completely. Mantrauśadhi-vaśa. Even, by mantra, the snakes can be charmed. So mantra is not ordinary sound vibration. So we have to keep the mantra in potency, potent, by offenseless chanting, by remaining pure. If you pollute the mantra, then it will lose its effect. (devotees discuss some money matters in background)
Compliments of Damaghosa das