Calling to the Ministry has certain characteristics. It should be a matter for the candidate to exemplify extended prayer, a great searching the Word of God for direction, and an exhibition of already qualifying traits as a faithful member of the local church. It ought also to be a matter of discerning God’s providence in both the desire to enter into the ministry and the need for ministry in some capacity. God’s qualifications for the call to the office of Pastor are seen in 1 Timothy 3 and Titus 1. Things to consider:
“The minister’s life is a life of consecration, without which it has no meaning.” – Alexander Vinet (1797-1847), Pastoral Theology
What is a pastor? “His name tells us: he feeds; he nourishes souls with a word which is not his own (as the shepherd nourishes his sheep on grass which he does not make to grow). But he feeds them by means of his own word, which reproduces and appropriates to their various needs the Divine Word, and becomes, in turn, a word of instruction, of direction, of exhortation, of reproof, of encouragement, and of consolation.” (Adolphe R. Vinet (1797-1847), Pastoral Theology or the Theory of the Evangelical Ministry.)
“Many a preacher is now in hell, that has a hundred times called on his hearers to use the utmost care and diligence to escape it.” Richard Baxter, The Reformed Pastor.
“Ministers’ sermons soften or harden hearers’ souls; they never leave you (in degrees of good or evil) as they find you.” Daniel Burgess (1645-1713) Directions for Daily Holy Living
"Take heed of settling yourselves under an unholy minister —of one whose life gives the lie to his doctrine. An unholy preacher is the greatest destroyer of the souls of men!" Thomas Brooks
"How can a minister successfully minister to others? “To observe the order of St. Paul (Acts 20:28; 1 Tim. 4:16), a minister must begin with himself, fulfill his own duties, and care for his own salvation before all things. Before going abroad from love to his neighbor, let him withdraw into the secret place of the divine holiness. Before compassionating the misery of others, let him be sensible of his own ills and of his own weaknesses. And, before urging others to obey the law of God, let him first obey it himself. The first duty of a bishop is to be holy.” Jacqeus Joseph Duguet (1649-1733), Traite des Devoirs d’un Eveque, art. ii., § 1.
“Watch your life and doctrine closely.” 1 Timothy 4:16
“Set an example for the believers in speech, in life, in love, in faith and in purity.” 1 Timothy 4:12
“In everything set them an example by doing what is good.” Titus 2:7
Ministerial candidates should have read their bible at least 10 times through seminary, plus the number of times based on years they are a Christian. Minimally.
I would counsel you, and every other ministerial candidate, to read the following:
The Best Method of Preaching by Peter van Mastricht
The Art of Faithful Preaching, and, The Calling of the Ministry by William Perkins
Sacred Rhetoric by RL Dabney
The Reformed Pastor by Richard Baxter
Thoughts on Preaching by JW Alexander
Pastoral Theology by Patrick Fairbairn
An Earnest Ministry by John Angell James
Lectures to My Students Complete and Unabridged by Charles Spurgeon
The Ministry of the Word by William Taylor
Hints and Helps in Pastoral Theology by William Plumer
Thoughts on Public Prayer by Samuel Miller
Pastoral Theology by Thomas Murphy
The Christian Ministry by Charles Bridges
Pastoral Theology: The Theory of a Gospel Ministry by Adolphe Vinet