You cannot change others. More people suffer from trying to change others than from any other sickness. And it is impossible.
What you can do is influence others. But there is a trick. Since you cannot get them to change, you must change yourself so that their destructive patterns no longer work on you. Change your way of dealing with them; they may be motivated to change if their old ways no longer work.
Another dynamic that happens when you let go of others is that you begin to get healthy, and they may notice and envy your health. They may want some of what you have.
One more thing. You need the wisdom to know what is you and what is not you. Pray for the wisdom to know the difference between what you have the power to change and what you do not.
— Dr. Henry Cloud & Dr. John Townsend, Boundaries, p. 89