How important is it that spouses are well matched?

Very important. Spouses should complement each other like two pieces that fit together without friction, and the most important factor is piety, not background or wealth.

In Islam the word for spouses being well matched is kufu. Some understand it to mean that both must come from the same class or family. But that is not what it means. Kufu means complementing one another, like two pieces of a puzzle that fit together exactly, without friction and without gaps.

A simple example makes this clear. Everyone has friends they love to sit with, and other people whose presence they find hard. If you are bound for life to someone from the second group, daily life becomes heavy. If your partner is close to you in nature and outlook, life together can become a piece of paradise even here on earth. You do not have to share every view, but some should be shared.

The Holy Prophet Muhammad (saw) named the most important measure: piety. Where it is present, it cushions many other differences. A God-fearing person can bear disagreements and forgive. Where it is missing and both think only of worldly things, small differences become large, and life can become very hard for both.

Families matter too. This is not about rank or money, but about decency and manners. Whoever marries also becomes connected, in a way, with the other person’s family. Constant tension between families can weigh on a good marriage. So it is wise to consider this as well before deciding.