A good man/woman will increase and help you multiply the resources you have, a bad man/woman will diminish your resources. This is why choosing should be done carefully.
Before marriage, we have to stay in courtship and get used to each other, this will help a lot in our marriage, because by then you would have been used to the kind of partner you're living with, nothing about their character would be strange to us, because we are going to enjoy each other after getting used to one another, this must also not be vested on one side alone, everyone is concerned in taking responsibility for each other and know the kind of partner they have right before marriage.