Mark Dever speaks to why endurance is such a necessary virtue for the Christian minister. In this talk, Dever aims to exhort pastors to not miss out on the joys of ministry, such as the joy of resting in the sufficiency of Scripture, the joy of hearing others preach better sermons than you, the joy of seeing others converted, and other joys.
The minister's knowledge
"Not to read or study at all is to tempt God: to do nothing but study, is to forget the Ministry: to study, only to glory in one's knowledge, is a shameful vanity: to study, in search of the means to flatter sinners, a deplorable prevarication: but to store one's mind with the knowledge proper to the saints by study and prayer, and to diffuse that knowledge in solid instructions and practical exhortations—this is to be a prudent, zealous, and laborious Minister."
— Quesnel quoted in Charles Bridges, The Christian Ministry, 50.