Clement of Alexandria — Stromata 23
Since pleasure and lust seem to fall under marriage, it must also be treated of. Marriage is the first conjunction of man and woman for the procreation of legitimate children. Accordingly Menander the comic poet says:— For the begetting of legitimate children, I give you my daughter. We ask if we ought to marry; which is one of the points, which are said to be relative. For some must marry, and a man must be in some condition, and he must marry some one in some condition. For every one is not to marry, nor always. But there is a time in which it is suitable, and a person for whom it is suitable, and an age up to which it is suitable. Neither ought every one to take a wife, nor is it every woman one is to take, nor always, nor in every way, nor inconsiderately.
But only he who is in certain circumstances, and such an one and at such time as is requisite, and for the sake of children, and one who is in every respect similar, and who does not by force or compulsion love the husband who loves her. Hence Abraham , regarding his wife as a sister, says, She is my sister by my father, but not by my mother; and she became my wife, Genesis 20:12 teaching us that children of the same mothers ought not to enter into matrimony. Let us briefly follow the history. Plato ranks marriage among outward good things, providing for the perpetuity of our race, and handing down as a torch a certain perpetuity to children's children. Democritus repudiates marriage and the procreation of children, on account of the many annoyances thence arising, and abstractions from more necessary things.
Epicurus agrees, and those who place good in pleasure, and in the absence of trouble and pain. According to the opinion of the Stoics , marriage and the rearing of children are a thing indifferent; and according to the Peripatetics, a good. In a word, these, following out their dogmas in words, became enslaved to pleasures; some using concubines, some mistresses, and the most youths. And that wise quaternion in the garden with a mistress, honoured pleasure by their acts. Those, then, will not escape the curse of yoking an ass with an ox, who, judging certain things not to suit them, command others to do them, or the reverse. This Scripture has briefly showed, when it says, What you hate you shall not do to another.
Tobit 4:15 But they who approve of marriage say, Nature has adapted us for marriage, as is evident from the structure of our bodies, which are male and female. And they constantly proclaim that command, Increase and replenish. Genesis 1:28 And though this is the case, yet it seems to them shameful that man, created by God , should be more licentious than the irrational creatures, which do not mix with many licentiously, but with one of the same species, such as pigeons and ringdoves, and creatures like them. Furthermore, they say, The childless man fails in the perfection which is according to nature, not having substituted his proper successor in his place.