Christians or others - How can I be this happy with myself without believing in your God.?

As a spiritual person I believe that we make our own happiness. That doesn't mean we will never suffer. We all have one thing absolutely in common. We are mortal. We are going to die. The amazing thing to me comes from finding others who realize that life IS joy regardless of the obstacles. I practice Buddhism, but don't think everyone else has to do that to be happy. Regardless of the rumors surrounding my particular sect, I share it because I see unhappy or angry people in my environment and have a skill or tool that I believe could help them. They have the power to ignore, reject or even debate it's efficacy, but I believe that if I did not share my knowledge and experience (regardless of my faith) it would be negligent. Thanks for being HAPPY and to hell with the 'devil(s)'!