Ioannis Vvolphii Tigurini De officio praeconis evangelici oratio, qua D. Pauli 2. Timoth. 2. locus explicatur, Stude teipsum probatum exhibere Deo, operarium non erubescendum, recte secantem sermonem veritatis

2 Timothy, chapter 4:
Preach the word, be urgent in season and out of season, reprove, rebuke, exhort, with all patience and teaching. For there will be a time when they will not endure the sound doctrine. But you, be watchful in all things, endure hardship, do the work of an evangelical preacher, perform your ministry honestly. Ministerium opus tuum implere facit Make full proof of your ministry. God help.
1 Timothy 6, at the end:
O Timothy, guard well what is entrusted to you, and avoid the unspiritual, empty chatter and the arguments of what is falsely called knowledge, which some have professed and have strayed from the faith.