Benefits of Beliefs #9: Having Absolute Truth.
Science consists of hypotheses that are falsifiable and modifiable. With enough evidence, those hypotheses are upgraded to theories, but they are still falsifiable and modifiable. Many religions, on the other hand, have Absolute Truth from on high. Furthermore, in a materialist world view, there is no absolute morality. Compared to the security of religious "thou shalt nots," it looks like building a house on a sand dune.
Although I'm no longer Catholic, I still have essentially the same attitude toward conversion that I did as a Catholic:
1. Conversion is good because all people deserve to have a shot at the truth (even if it's not the Truth).
2. Aggressive conversion is bad because it is counter-productive--you just scare people off.
3. When asked, or when it comes up in conversations, be willing to intelligently discuss your beliefs. Do not try to convince anyone of anything--just state what's convincing to you and why. Be willing to be drawn into respectful debates, but do not begin them, and end them if they get personal. It's not about winning the argument (unless the argument is "don't sacrifice your children to Cthulu" or similar). It's about giving your debater more ideas to work with (planting seeds, so to speak), and refining your own beliefs.
4. Always try to be the person you'd like everyone else to be. If you're successful, maybe someone will ask you what's your secret to being so fabulous. If you're not, it's still a life well lived.
St. Francis:
“Preach the Gospel at all times and when necessary use words.”
A speaker from Opus Dei:
"Anything good can be used to bring people to God. If you and a friend both like beer, then use beer to bring them to God."
Explanation: She wasn't saying to get your friends drunk and brainwash them. She was saying that you should bond with people over common interests, and then have deep conversations with them. Of course (though it's not explicit in the quote), you're not supposed to try to convert people just to try to get your "conversion points" up. If you are converting people, it should be as part of a general interest in their welfare. People can tell the difference between a friend whom you would like to convert, and a potential convert whom you befriend.