General Motivation for a general audience sounds like a hard focus point. Try breaking down- all motivation have singular aspects outside of faith and religion. What are your topics? Relationship, Career, depression/Mental illness, etc?
Sometimes there's a need to talk things through to fully understand what it is you have rather than switching focus. I've been to art school, I've proofread and guided lots of writers through this- the creative process takes some analysis, but sometimes you're just too close to see what's right in front of you. Take a step back, do some general blogging. Tumblr is great for becoming engrossed in various cultures- the motivation culture is one of them! Take time to know the general community and that will help.