Religious system cannot be manufactured by man. No. Man-made religion is not religion. Religion means God-made religion. That is religion. Dharmaà tu säkñät. Just like law. Law means the orders enunciated by the government. You cannot manufacture law at home. That is not law. Similarly, religion means the orders given by God. This is simple definition of religion.

From Srila Prabhupada’s lecture at St. Pascal’s Franciscan Seminary – June 28, 1974, Melbourne