Sotah 2 - Man deserves what he gets
If a husband becomes particularly jealous of his wife in a regard to a certain fellow, he can warn her not to seclude herself with that fellow. If she does, she is suspected of adultery and needs to go to the Temple, together with her husband, to be cleared of the suspicion. The Talmud will discuss the details of this warning, but first it asks a question, how is the previous Tractate, Nazir, connected to this one?
The answer is that a man who sees such strife between a husband and wife should abstain from wine, because he too may become involved in similar affairs, and often through wine. This is not a good reason, however, because in that case Sotah should come first, and then Nazir. Rather, the connection is more roundabout: in Ketubot (Dowry) we mentioned one who vows in regard to his wife, from there we went to discuss Vows (Nedarim) and then Nazir, which is a type of vow, and finally we are back to Sotah, just as we said before, but in a different order.
In truth, man should blame himself for any marital trouble, since the wife one merits is in proportion to his own good qualities; in general, finding the right spouse is as hard in the eyes of God as splitting of the Red Sea. But why should it be so hard? We know that the spouse is predestined for every person when he or she is born!? - When we say that it is hard, we mean the second marriage.
Art: Portrait of a Couple by French Unknown Masters