1 Corinthians 9:23

9:23 I do all these things because of the gospel, so that I can be a participant in it.

1 Corinthians 9:2

9:2 If I am not an apostle to others, at least I am to you, for you are the confirming sign of my apostleship in the Lord.

Colossians 4:5

4:5 Conduct yourselves with wisdom toward outsiders, making the most of the opportunities.