The varnasrama system is for convenience sake in the material world. It has nothing to do with spiritual life. Acceptance of varnasrama means a little easy progress to spiritual life, otherwise it has no importance to us. For example, all my European and American disciples have no varnasrama position, but spiritually because they have followed the rules and regulations and also my instructions, their advancement spiritually is being appreciated by everyone. Always remember that varnasrama life is a good program for material life, and it helps one in spiritual life; but spiritual life is not dependent upon it.

From Srila Prabhupada’s letter to Hamsaduta — 19 Oct 1974.