"I'd rather be climbing a mountain thinking about God than sitting in a church thinking about climbing a mountain"
I saw that on a hiking forum and I really liked it. For the sake of this forum we can replace "climbing a mountain" with "riding my bike" (unless of course you like to climb mountains on your bike . . .).
I'm not religious myself, I'm more with the spiritual nature-loving crowd. I like to be outdoors to experience the connectedness of living things with nature.
The best part about going up hills is riding back down!