As I grow older, I look around me and see equations changing, tables turning. Its just a matter of may be 2 or 3 decades but one thing that I notice is people who were young, powerful and with authority once have become older now and ones whom they dominated have grown young and powerful. Now that child is a young person and the young person is more or less powerless and repentant (might not admit though!).
The authoritarian can be a parent, a teacher, a relative, a boss, a neighbor, someone with more power, money, beauty and good health. They forget nothing remains permanent, that change is the only constant. The damage that they do is forgotten by them, but not by the one who bears the brunt of that damage. Someone prettier and richer than you might have mocked you and now he/she might have lost that youth, beauty and power. A parent who might have been emotionally or physically detached or abusive wants the grown-up child to shower him/her with love and emotions.
Don’t push away people and relations when you are at your prime. Don’t let your ego ruin everything. Some day you will lose your prime and the one who was weaker will be in his/her prime. Those lost years, damaged relations, hurt and bruised hearts won’t just mend magically. Be good, be nice when you have all the energy, money, youth, beauty and time because by the time you realize your follies it might be too late to mend the broken hearts and relations.