Thinking of Entering the Ministry?

Arthur Pink:

How diligently should they scrutinize their motives, who think of entering the ministry; for thousands have abused this Divine institution through love of ease, desire for authority and reputation, or love of money–and brought upon themselves “greater damnation” (James 3:1). Thousands have invaded the pastoral office in an unauthorized manner, to fleece sheep rather than feed them, robbing Christ of His honor and starving His people.

Solemn beyond words is it to observe how sternly our Lord denounced these false shepherds of His day. (Matthew 23) As J. C. Ryle rightly said, “Nothing seemed so offensive to Christ as a false teacher of religion, a false prophet, or a false shepherd. Nothing ought to be so much feared by the Church, be so plainly rebuked, opposed and exposed.”

What are the marks of a true shepherd, how are God’s people to identify those called and qualified by Him to minister unto His people?