Luke 22:32 (NIV)
32 But I have prayed for you, Simon, that your faith may not fail. And when you have turned back, strengthen your brothers.�

Note that Jesus has told Simon Peter that his faith would fail him, but when his faith returned that he would be able to use it to strengthen others.

John Piper writes in Bloodlines, (Crossway 2011), One of the lessons I have learned in six and half decades of life is that very few dreams should go on hold while you improve the shortcomings of your life �. To be sure, there are times when you need to stop what you are doing and focus on conquering a flaw. But if you wait till all your shortcomings are remedied, your dreams will die. All our advances are with a limp.

If you wait till you are beyond criticism to pursue your dream, you will never do it. You won't marry or stay married. You won't decide to have children or raise them. You won't take your first job or keep it. You won't go into missions or stay there �. Few things paralyze people more than their own imperfections. And there are always people around to remind you of your flaws and suggest you can't move forward until you're better.

Many of you will fail in life just as Peter failed, but that doesn�t mean you have to remain down for the count. The Lord is with you and during the times you fail, The Lord becomes strong in your life. Remember The Lord is always with you and you can use your failures to help someone else who has failed also.