About a year ago, we took a trip to Isla Mujeres off the coast of Cancun. Yes, it means "Island of Women." And yes, I'm married to a woman who will ask me to take her and spend a week on the Island of Women. All you guys can eat your hearts out.

We had never been scuba diving, so we signed up for a beginner dive. I have to admit I had some anxiety. Maybe it was because as a kid I had asthma, so I knew the panic that sets in when you can't catch your breath.

Or, maybe it was due to the fact that our instructor, who did not speak English, sat us down in a small room and turned on a video tape that did speak English. The tape walked us through how to put on our gear, how to add weight to our belts, and how to put in our mouthpieces and breathe.

The film was short. I figured we'd have a test or watch it again to make sure we understood it all. However, we were immediately taken outside to the pier and told to get in the water. It was only chest deep. Apparently they didn't want to drown us right off the bat. They merely wanted us to get a chance to go under the water, see what it was like to breathe through the mouthpiece, and learn how to get water out of our goggles.

Then we got in the boat, and the boat left the dock. We took off on a nice tour of the area, when suddenly our captain stopped. We were definitely out in "past the chest deep" water. The instructor left the boat and swam over to a buoy that had a line attached that went to the ocean floor. We were told to follow.

One-by-one, we fell backwards into the water and swam over to the instructor. Kris was first, then Taylor, then Karen and then me. I could tell the teacher was motioning something to the boys. Suddenly Kris disappeared, and then Taylor. Being a gentleman, I offered to let my wife disappear next. However, something was not quite right about her gear, so my number was called.

I grabbed the line, and next thing I knew I was in over my head. The video taught us to take two pulls on the rope, then to hold our nose and to blow gently to decompress our ears. I did this religiously. After a few pulls, I bumped into something. "I should not have watched Jaws before this trip," I thought, but it was only the boys. I was already at the bottom, about 35-40 feet under and I was breathing just fine.

We had our underwater adventure and returned to the scuba shop. When we got there, we found one of the other men. He was all geared up, but he had stayed behind. I quizzed him and found he knew everything he needed to know about scuba diving for that particular excursion. His goggles fit. His tank was full. He was telling anyone who would listen how much he knew about scuba diving. He just never went into the water.

When our kids were younger, they called such people "posers."

Isn't it about time to become good at obeying.
There were some "posers" in Jesus' day too. Jesus says this during his Sermon on the Mount:
"Why do you call me Lord, Lord, and do not do the things I say?" (Luke 6:46).

Maybe Jesus saw a look in their eyes as he taught them about entering the kingdom through the narrow gate and bearing good fruit. Apparently there were some who listened to him. Some who talked about him. Some who had carefully watched his instructional DVD teaching series. Some who greeted him at their church doors. Some even knew how to call him by a correct title. Then, when the dismissal was given, everyone rushed out to beat the other Sunday go to church folks to their local restaurants. Unfortunately, many did not go out and do what Jesus said to do with their lives.

Jesus was adamant that his followers understand that he wanted more for them than to just listen to his words. He wanted them to do — enter by the narrow gate, bear good fruit, and be wise builders. He wanted them to hear his words and do them.

If you've become good at posing, then isn't it about time to become good at obeying? Find out what Jesus wants you to do and dive in — we've already got too many folks still at the dock telling everyone else how much they know.