NET
16 by holding on to the word of life so that on the day of Christ I will have a reason to boast that I did not run in vain nor labor in vain.
Darby
16 holding forth [the] word of life, so as to be a boast for me in Christ's day, that I have not run in vain nor laboured in vain.
KJV
16 Holding forth the word of life; that I may rejoice in the day of Christ, that I have not run in vain, neither laboured in vain.