An old mystic said this about himself: "I was a revolutionary when I was young, and my prayer to God was, 'Lord, give me the strength to change the world.' As I approached middle age and realized that my life was halfway gone without changing a single soul, I changed my prayer to, 'Lord, give me the grace to change all those who come into contact with me, especially my family and friends, and I shall be satisfied.' Now that I am an old man, and my days are numbered, I have begun to see how foolish I have been. Now my one prayer is this, 'Lord, give me the grace to change myself.' If I had prayed that right from the start, I would not have wasted my life."
We can waste years trying to change other people. But we can only really change one person -- ourselves. In the end, that is probably enough.