Thomas Watson on the uniqueness of the calling of pastors and gospel ministers:
God has cut out the minister his work which is proper for him and does not belong to any other. ‘Give attendance to reading, to exhortation, to doctrine … give thyself wholly to them’, or, as it is in the Greek, ‘Be thou wholly in them’ (1 Timothy 4, 13-15).
This charge is peculiar to the minister and does not concern any other. It is not spoken to the tradesman that he should give himself wholly to doctrine and exhortation. No, let him look to his shop. It is not spoken to the ploughman that he should give himself wholly to preaching. No, let him give himself to his plough.
It is the minister’s charge. The apostle speaks to Timothy and, in him, to the rest who had the hands of the presbytery laid on them. And ‘Study to shew thyself approved …, a workman that needeth not to be ashamed, rightly dividing the word of truth’ (2 Timothy 2:15).
This is spoken peculiarly to the minister. Everyone that can read the word aright cannot divide the word aright. So that the work of the ministry does not lie in common; it is a select, peculiar work. As none might touch the ark but the priests, none may touch this temple-office but such as are called to it.”