Focus

When Isaiah saw the Lord high and lifted up, he didn't say, "Look at all those awful sinners everywhere." What he said was, "Woe is me for I am undone." And then he cried out, "Lord, here am I. Send me.!" Are we so busy looking at the world and complaining to God that we haven't gazed at His holiness and marveled at the grace He's shown us.
If you meditate on His holiness, it's not the world's sin you'll be focusing on. And when my heart cries out, "Woe is me!" then He can use me, God resists the proud and gives grace to the humble.