Phillippians 3:3 for we are the circumcision, who worship by the Spirit of God, and glory in Christ Jesus, and have no confidence in the flesh:

Paul places no confidence in the abilities and efforts of human beings. 
Same as Paul, We don't need self-reliance, we need Christ-reliance. We don't need self-sufficiency, we need Christ-sufficiency. We don't need self-confidence, we need Christ-confidence. Instead of learning how to rely on ourselves and believe in ourselves, we need to learn how to rely on Jesus and believe in Jesus.

The main issue of life will not be properly resolved until we realize that we can do nothing apart from Jesus Christ (see John 15:5).
Love and prayer, 
George achan.
☆ 
(Bible league international)