Philippians 4:13 is a statement by the Apostle Paul. In the King James Version, with its immediate context in Philippians 4:11-13, it reads:
Philippians 4:11-13 (KJV)
11 Not that I speak in respect of want: for I have learned, in whatsoever state I am, therewith to be content. 12 I know both how to be abased, and I know how to abound: every where and in all things I am instructed both to be full and to be hungry, both to abound and to suffer need. 13 I can do all things through Christ which strengtheneth me.