Some of the past posts on minister burn out really apply. Adrian Rogers whom I respect deeply found the secret to being a minister long term. That is he has known the infilling of the Holy Ghost with power which lead him to truly know whom he has believed. The vision is really not new just a returning to your first love. For when you fellowship with the Most High and enter daily into his grace, then come what may your peace and joy will hold through the years and countless storms. It is when we neglect our first love and allow the duties of each day take precedence over our fellowship with our heavenly Father, that the burdens of the day grow heavy and the more we neglect our personal worship the worse our responsibilities become.  Today many are burning out simply because they think doing for God is the same as being with God.