29 To this end I strenuously contend with all the energy Christ so powerfully works in me.

29 For this I toil, struggling with all his energy that he powerfully works within me.

29 Whereunto I also labour, striving according to his working, which worketh in me mightily.

29 That’s why I work and struggle so hard, depending on Christ’s mighty power that works within me.

29 To this end I also labor, striving according to His working which works in me mightily.

29 To do this, I work and struggle, using Christ’s great strength that works so powerfully in me.

29 whereunto I labor also, striving according to his working, which worketh in me mightily.

29 Whereunto also I toil, combating according to his working, which works in me in power.

29 I work hard and struggle to do this while his mighty power works in me. 

29 I labor for this, striving with His strength that works powerfully in me.

29 For this I toil and struggle with all the energy that he powerfully inspires within me.

29 for which purpose also I labor, striving according to his working which is at work powerfully in me.

29 That’s what I’m working for. I work hard with all of Christ’s strength. His strength works powerfully in me.