In today's first reading we are told to do three simple things in relation to Christ
—walk around in him
—be rooted in him
—be built up in him
The being rooted part I think we all get. We understand how important it is for Christ to be the foundation of our lives.
The third one is a bit more difficult, the idea that not just the foundation but the whole building must be constructed in Christ. We still on some level want to hold on to most of it. It's my life, we tell ourselves.
But the first one it seems is the most critical. The Greek verb here is peripateo from which we get peripatetic in English. Imagine if we actually did that. Imagine if every time you got up to walk around, even just rambling around the house, you consciously did it in Christ. You walk down the hall at work to a meeting in Christ. When you get out of the car to walk into work, or a store, you walk in Christ. Every time you get up to move the first word that pops into your head is Christ, or Jesus if you prefer.
In the 21st century we are a peripatetic people. We run around from place to place, our minds flit from thing to thing. Imagine how it might change your life if all that motion were done in Christ. —a habit worth developing, I think.