Learn to be kind to people because everyone is going through something, and your kindness may be what someone else needs. If you think you know it all, your ego has become too big, be intentionally humble. No one owes you an explanation or favours, even if it is promised to you, learn to live and forgive without either. You have knives on your back and you will walk around with wounds throughout your life, but that does not mean your knife should be on someone's back. Don't live life expecting it to be easy, no one is promised a pain-free and easy life, some people are good at hiding their challenges. Learn from everyone, big and small.