That Which Suffices is not Sufficient

In the great book Holy Abandonment by Dom Lehody is this comment by Joseph de Maistre,

"That which suffices is not sufficient.  Whoso resolves to do all that is permitted will soon be found doing that which is not; and he that will content himself with what is of strict obligation will be content with a little less before long."

I think this sums up fairly well the attitude of many Catholics born and raised pre-Vatican II and explains their resultant falling away from or laxity in the Faith afterwards.