Let him feel as a grievous tax that portion of this property which he has to make over to his employers, and as a generous donation that further which he allows to religious duties.
But what he must never be permitted to doubt is that the total from which these deductions have been made was, in some mysterious sense, his own personal birthright.

The man can neither make, nor retain, one moment of time; it all comes to him by pure gift … if the Enemy (God) appeared to him in bodily form and demanded total service for even one day, he would not refuse.
. . . he is actually in this situation every day
CS Lewis, The Screwtape Letters