Scripture points out this difference between believers and unbelievers; the latter, as old slaves of their incurable perversity, cannot endure the ro… - John Calvin

The voluntary spilling of semen outside of intercourse between man and woman is a monstrous thing. Deliberately to withdraw from coitus in order that semen may fall on the ground is doubly monstrous. For this is to extinguish the hope of the race and to kill before he is born the hoped-for offspring.

Man doubtless has been made subject to vanity—man here been reduced to nothing—man is nothing. And yet how is he whom God exalts utterly nothing? How is he nothing to whom a divine heart has been given? Let us breathe again, brethren. Although we are nothing in our hearts, perhaps something of us may lurk in the heart of God.

First of all, Scripture draws our attention to this, that if we want ease and tranquility in our lives, we should resign ourselves and all that we have to the will of God, and at the same time we should surrender our affections to him as our Conqueror and Overlord.