Question: Why does one person, by nature and their upbringing, turn out to be a big egoist and another a small egoist? Will a person who has a bigger ego experience greater sufferings, and is this related to his ancestors or his actions in previous lives?
Answer: Everything you have said is true, but it is meaningless.
Your current freewill, the freedom to fulfill the spiritual potential is in you, and you need to try to fulfill it. Try to do it with all your might and then you will see what happens to you and why. You will see how your spiritual potential and the spiritual potential of your ancestors impacts you, and how you impact everyone else.
All this will happen. Don’t pay any attention to what happened before. At the present moment everything depends only on you.
From KabTV’s “Fundamentals of Kabbalah” 11/18/18