colossians 4:2-6
2 Devote yourselves to prayer, keeping alert in it with an attitude of thanksgiving; 3 praying at the same time for us as well, that God will open up to us a door for the word, so that we may proclaim the mystery of Christ, for which I have also been imprisoned; 4 that I may make it clear in the way that I ought to proclaim it.
5 Conduct yourselves with wisdom toward outsiders, making the most of the opportunity. 6 Your speech must always be with grace, as though seasoned with salt, so that you will know how you should respond to each person.