Where and When Did You Lose Your Cutting Edge in Ministry?

Ministry is not for the faint of heart.  Ministry is not for those who do not crucify the flesh with its affections and lusts.  Ministry is a calling, and as such only the called should enter into ministry.  There are those who doubt or are suspicious of the call to ministry.  Statistically those who enter into ministry and have not been called by God leave the sacred work for some vocation more financially rewarding.  However, to those who are called of God where did did you lose your cutting edge?