Greek: 13 πάντα ἰσχύω ἐν τῷ ἐνδυναμοῦντί με [Χριστῷ].
My Translation: 13 I am able to do everything through him [some manuscripts: "Christ" ] who strengthens me.
KJV: 6 I can do all things through Christ which strengtheneth me.
My translations are purposefully stretched and should not be viewed as more accurate than the KJV translation unless I say so in the post. I'm trying to show the range lying between the original Greek text and the English.
I have not yet begun work on a post to discuss this Scripture Mastery selection, but I've posted up my translation until I finish the post.