"Or do you not know that your body is the temple of the Holy Spirit who is in you, whom you have from God, and you are not your own? For you were bought at a price; therefore glorify God in your body and in your spirit, which are God’s," 1 Corinthians 6:19-20.
How many times have you read that passage? Probably many times. The understanding of this passage is that Jesus died for us, so we are living for Him. That's the true understanding of this passage, but it can also be applied and understood in a different way.
Let's take the last part of the first verse and the first part of the second verse. When we hear this passage, we usually say it this way, "You were bought with a price - you are not your own." This can easily be applied to your employer. When you're at work, you are working for your employer. You aren't doing your own thing, you're working for him or for her. You're on their clock.
(This is also a reason you should not be in a bad company or working for someone with not good intentions, as you're working on their clock.) In a similar (but significantly different) way, when we're at work, or school, or the grocery store, or wherever we are, we are on God's clock, doing His work.
"Let the word of Christ dwell in you richly in all wisdom, teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord. And whatever you do in word or deed, do all in the name of the Lord Jesus, giving thanks to God the Father through Him" (Colossians 3:16-17).