Free your mind of that which you have no control. It is not only good to do so for your mental, but your overall health. Some people must learn from experience. You can convey knowledge to them and offer to show them the way. But, that doesn't mean your wisdom will be accepted or appreciated.
If you want to be reminded of the love of the Lord, just watch the sunrise.
Don't forget, a person's greatest emotional need is to feel appreciated.