By studying the Bible, we learn how to live as we should. The Bible teaches us that we are the children of God, and each one is an individual different from all others. We must not envy others, but accept who we are, and strive to use all our spiritual potential in pleasing God.
When we fail, we must forgive ourselves, and go on to be faithful to what we know we should. We should love ourselves enough to seek to do that which is best for our souls. We will never be what we should, unless we think that we can be what we ought to be.
I'm not suggesting that we are self-sufficient, but having been created in the image of God, with His help, we can be everything He would have us to be. Paul said in Philippians 4:13, "I can do all things through Christ who strengthens me." Thus, the "I can't do it" attitude is a good one. We shouldn't underestimate what God can do through us.
Paul makes another incredible statement in Ephesians 3:20-21. He writes, "Now to Him who is able to do exceedingly abundantly above all that we ask or think, according to the power that works in us, to Him be glory in the church by Christ Jesus to all generations, forever and ever. Amen."
Remember, the power is in Christ. We must rise up and rely upon Him, and believe that we can be everything that God wants us to be. Herein lies the secret of an abundant spiritual life in Christ. Let us learn of Christ, obey Him, and rely upon Him. Let us not allow the devil to defeat us with doubt, uncertainty, and inactivity. Let us be like the people of God in Nehemiah's day who said, "Let us rise up and build" and who "strengthened their hands for the good work" (Nehemiah 2:18).