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.
I agree with you, the person you are going to make your life partner or the one you are going to spend your whole life with must be like your own mind. And for this, getting to know each other's nature and character before marriage will definitely be a big help, remember that choosing the wrong life partner will ruin the rest of your life, that is why you must be careful in choosing a life partner and you should accept the one with whom your nature and character match as your life partner.