Respond to God's call
Many they are that do not respond to God's call.
They feel they lack the ability to do what God called them to do.
God does not call us because of our abilities into His Kingdom.
Instead He calls us first and when we respond to His call He chooses us.
After He chooses us, He adds to us the abilities.
The apostles were called to be apostles first.
They weren't endued with the Power of Apostleship until the day of the Pentecost.
Many are called but few are chosen.