A few things to remember.. What they have is shallow happiness.. It depends on something else. It could be washed away anytime. It is like a sand castle. Does not take much to get washed away or blown away. When our faith is anchored in Christ, we have joy in Him. Nothing can take that away from us. Also, like sister Euphemia highlighted, they have happiness. Believers have joy. It is 2 different things. Our joy is not dependent on Lord and not of our situation.Or at least me.
All the kids in my school look like they enjoy their life a lot. The best time in my life that I remember was sixth grade, before I was saved, though i was a "Christian", when I was making YouTube videos, making raps, playing Yugioh, and playing Pokemon. Now, my life is dull and bland, because I gave up just about everything that I liked doing. In fact, I'm pretty sure I gave up everything.
The Bible tells us to be joyful, but that doesn't make me joyful. And some people might tell me that the joy is there waiting for me, and I have to do is "take" the joy. Sorry, that's not how it works.
Do you guys enjoy your lives? Do you enjoy it more than when you were not saved?
Remember, unbelievers are only part of this world. We are in the world, but not part of the world. We are separated out as our destiny is eternity. Remember the times of Noah? The whole world was "happy". They were getting married, celebrating, partying and so on. It all ended abruptly. Not for Noah. He might have looked a little foolish working day and night building the ark while his secular friends were partying.
Don't look to the materialistic world for joy. Seek the Lord. While we all are giving these advices, we are preaching to ourselves as well!! This will continue to look like this in university, work and so on.