Thomas Watson 
The Art of Divine Contentment [EPUB ebook] 

Based on Philippians 4:11, I have learned, in whatever state I am therewith to be content, Watson considers the great dishonor done to almighty God by the sin of discontent. The doctrine of Christian contentment is clearly illustrated and profitably applied. The special cases where, through changes in providences, discontentment most commonly arises are examined and preservatives are applied to the soul.