Have you considered that the universe is a scary and cold place, and considering it in its true nature does not make one happy?
What makes a child happier: 1.) Believing a magical elf brings presents from the North Pole because of good behavior, or 2.) Understanding that presents come from mom and dad's hard work, and when you hear them worrying about money or fighting over it - you know in some small way you are a part of that stress?
The truth rarely bring happiness, merely a sense of intellectual relief. It also usually creates more questions than it answers, despite any temporary enlightenment. How many of us would ever leave the womb, if given the choice? It is warm and safe in there - and everything is taken care of. But outside that womb is where life happens and things get complicated.
Religion is like the intellectual womb - except this is one you have to choose to leave, and it's scary and takes strength of character to do so.
"It is better to simply present the central tenets of religion in a way which emphasized that there is reason on both sides - against, yet also for, the truth and reality of Religion. Or to put it another way, it can reasonably be argued that it is not impossible that religion is false; but also, it is not impossible that religion is true.
Each person can make a choice; indeed each person must make a choice for themselves and upon that choice a great deal hinges maybe in the afterlife but definitely in the here and now." -Bruce Charlton
(The reply above was borrowed from the blog of Bruce Carlton as he articulated this point very well. Here is a link to his blog)
http://charltonteaching.blogspot.com/?m=1