Mankind is notoriously too dense to read the signs that God sends from time to time. We require drums to be beaten into our ears, before we should wake from our trance and hear the warning and see that to lose oneself in all, is the only way to find oneself.
If you first fortify yourself with the true knowledge of the Universal Self, and then live in the midst of wealth and worldliness, surely they will in no way affect you.
Money was established for exchange, but interest causes it to be reproduced by itself. Therefore this way of earning money is greatly in conflict with the natural law.