Can you imagine Jesus questioning His purpose in life? The strength, security and authority that Jesus exercised was established because He knew who He was. He was the Son of God given authority to rule as King! 1 John 4:17 says, "as He is, so are we in this world."
If we have access to doing the things Jesus did, why aren't they being done? Because of lack of knowledge. It all comes back to what you know. "What you don't know, won't kill you,' is a phrase hell came up with. It's our lack of knowledge that arrests us and enslaves us to the power of darkness. Until we get familiar with the Word, we can never execute the correct authority for a turnaround. It's until we see ourself through the glasses of the Word of God that we can have security knowing who we are and what we're called to do.
Don't walk around hopeless and confused. Get in the Word. Don't pray for more power. Get in the Word! Don't shrink back in fear. Get in the WORD!