Answer: Paul served God with his whole heart in
preaching the Gospel of His Son, (verse 9).
MORE INFORMATION AND/OR OTHER SCRIPTURE REFERENCES:
1 Corinthians 9:16: "Yet when I
[Paul] preach the Gospel, I cannot boast, for I am compelled to
preach. Woe to me if I do not preach the Gospel!"
Galatians 2:7-8: "On the contrary,
they saw that I [Paul] had been entrusted with the task of
preaching the Gospel to the Gentiles, just as Peter had been to the
Jews. For God, Who was at work in the ministry of Peter as an
apostle to the Jews, was also at work in my ministry as an apostle
to the Gentiles."
Ephesians 6:7-8: "Serve
wholeheartedly, as if you were serving the Lord, not men, because
you know that the Lord will reward everyone for whatever good he
does, whether he is slave or free."
Colossians 3:23-24: "Whatever you
do, work at it with all your heart, as working for the Lord, not
for men, since you know that you will receive an inheritance from
the Lord as a reward. It is the Lord Christ you are
serving."
