“Therefore, my beloved brethren, be ye steadfast, unmoveable, always abounding in the work of the Lord, forasmuch as ye know that your labor is not in vain in the Lord” (I Corinthians 15:58).
Probably the most commonly asked question of a seven year old is, “What do you want to be when you grow up?” Usually the little one is so frozen with fear that the one inquiring must resort to a form of interrogation: “a doctor, lawyer, policeman; I know, a fireman!” These are noble professions indeed, but why are children almost never encouraged to pursue the ministry? Is the Lord’s work any less meaningful? Are the callings of pastor, evangelist, missionary and Christian counselor unworthy of our childrens’ consideration? Parents do well to remember that there is no higher calling in life than the Lord’s service.
Sadly, our young people are so preconditioned to aspire to worldly professions that the ministry is not even a viable option. Timothy’s mother had no way of knowing whether or not God would call her son into full-time service. But to her credit, she trained Timothy from a small child in the Scriptures to prepare him for the things of the Lord. Shortly after his conversion to Christ, he was called into the ministry where he delivered many from a Christless eternity (II Tim. 1:6).
During those formative years we need to encourage our young to seek the face of the Lord as to what area of Christian service the Lord might use them. source