Еврейская мысль к Мишлей 24:27

Since the Torah approves of the following order in life: 1) building a house, 2) a vineyard (livelihood), 3) taking a wife, we read about the betrothal of Isaac at the end of this Parshah, just as at the story of man's creation his betrothal was the culmination of the process of his creation (compare laws about exclusion from military service Deut. 20,5-7 and Talmud Sotah 44). Apart from the fact that it is foolish to assume responsibilities such as marriage without due preparation, it also results in the husband having no time to achieve his earthly tachlit, purpose, since he will not have leisure to study Torah (Kiddushin 29). The fact that Isaac waited till the age of forty, i.e. the age at which one reaches binah understanding, insight, indicates that such maturity is needed. Even an Esau made a point of getting married at the age of forty, to demonstrate his own maturity to one and all (Bereshit Rabbah 65). Under such circumstances, what the Talmud calls zivvug sheyni, the second mating can take place, and G-d matches partners so that they complement each other suitably.