Back in the early 90's, a new film version of the story of Robin Hood was released. The soundtrack of that movie included a song titled, "(Everything I Do) I Do It for You," a love song in which a man is pledging his love to a woman and telling her that everything that he does is done for her.
Colossians 3:17 tells us that everything that we do should be done for, and in the name of, the Lord Jesus. And not only that, but we should also be be giving Him thanks through what we do. This applies not just to our service to Him in our church, but also in the things we do in our everyday life as well. When we spend time with our spouses or our families, in the jobs that we go to each day, even when we do things around the house like cooking and cleaning. In everything we do, whether spiritual or mundane, we need to honor Him.
The verse also mentions our words. That means that we must not only honor Him in what we do, but also in the words that we speak. How do we make sure that the words we speak honor Him? For one thing, as it says in Philippians 4:8, we can start by focusing our thoughts on things that are excellent and praiseworthy, things that are noble and true. There is a saying in the field of computer science that says, "garbage in, garbage out." This applies to our minds just as much as it does to computers. If we put garbage in our minds, what comes out of our mouths will be garbage. So, it stands to reason that when we think about the types of things listed in Philippians 4:8, what comes out of our mouths will be true, noble, admirable, excellent, and praiseworthy. And, of course, it will honor the Lord.