"But let patience have its perfect work, that you may be perfect and complete, lacking nothing." James 1:4 (NKJV)
This verse is a wonderful motivation to discouraged Christians. Through God's power we can be complete! To understand better the setting of this verse, go ahead and read the entire book of James. It has a lot of practical commands for christians in this life. Ask God to help you live by these rules and he will help you become "perfect and complete, lacking nothing."