Matthew 7:4 (TLB) Should you say, "Friend, let me help you get that speck out of your eye," when you can’t even see because of the board in your own?
1 Corinthians 4:5 (NIV) Therefore judge nothing before the appointed time; wait till the Lord comes. He will bring to light what is hidden in darkness and will expose the motives of men's hearts. At that time each will receive his praise from God.
Gladly we desire to make other men perfect but we will not amend our own fault. —Thomas à Kempis in Imitation of Christ.
Elesha Hodge, comp., Today's Best Illustrations – Volumes 1-4, (Carol Stream, IL: Christianity Today, 1997), WORDsearch CROSS e-book, Under: "FAULTFINDING".