2 Timothy 2:12-15

if we suffer, we shall also reign with him: if we deny him, he also will deny us: if we believe not, yet he abideth faithful: he cannot deny himself. Of these things put them in remembrance, charging them before the Lord that they strive not about words to no profit, but to the subverting of the hearers. Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.