Fleshly and Spiritual Duties

To follow up on my last post, I thought I would post Thomas Wilcox's view on Christian duties (found in his Honey from the Rock).  His perspective on duties is a clear application of the Flesh/Spirit dichotomy.  So, here it is:

 

"What duty make not more spiritual, will make more carnal [fleshly]; what does not quicken and humble, will deaden and harden."