Moving from the topic of Pride, the great sin, to a discussion of the theological virtues of Charity (Love) and Hope, Lewis's trenchant analysis of why we need to reclaim these virtues is an important word for the church today. "Good and evil both increase at compound interest. That is why the little decisions you and I make every day are of such infinite importance. 

https://www.youtube.com/watch?v=W2oYTtyBSxk