Pentecost changes wimps into warriors. The Holy Spirit will not play second fiddle while we fiddle around. The aging process weans us of our self-sufficiency. The Bible is God's jigsaw puzzle, so we need the Holy Spirit to show us the picture on the box. Unconfessed sin is the devil's welcome mat.
Faith removes the limitations imposed by our senses.
If we need to understand God before we trust Him, we will never understand. First, trust God and understanding will follow. Pride may keep us from asking for prayer, but it won't keep us from needing it. Tithing will make getting rich a lot easier. Service to God may seem sacrificial, but only if we think short term.