NET
15 Make every effort to present yourself before God as a proven worker who does not need to be ashamed, teaching the message of truth accurately.
Darby
15 Strive diligently to present thyself approved to God, a workman that has not to be ashamed, cutting in a straight line the word of truth.
KJV
15 Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.