XIII.  I know of three classes among the saved; the slaves, the hired servants, the sons.  If you are a slave, be afraid of the whip; if you are a hired servant, look only to receive your hire; if you are more than this, a son, revere Him as a Father, and work that which is good, because it is good to obey a Father; and even though no reward should come of it for you, this is itself a reward, that you please your Father.  Let us then take care not to despise these things.  How absurd it would be to grasp at money and throw away health; and to be lavish of the cleansing of the body, but economical over the cleansing of the soul; and to seek for freedom from earthly slavery, but not to care about heavenly freedom; and to make every effort to be splendidly housed and dressed, but to have never a thought how you yourself may become really very precious; and to be zealous to do good to others, without any desire to do good to yourself.  And if good could be bought, you would spare no money; but if mercy is freely at your feet, you despise it for its cheapness.  Every time is suitable for your ablution, since any time may be your death.  With Paul I shout to you with that loud voice, “Behold now is the accepted time; behold Now is the day of salvation;” 2 Cor. vi. 2. and that Now does not point to any one time, but is every present moment.  And again “Awake, thou that sleepest, and Christ shall give thee light,” Ephes. v. 14. dispelling the darkness of sin.  For as Isaiah says, Isa. xxviii. 19, LXX. In the night hope is evil, and it is more profitable to be received in the morning.