In the article he cites extensively from The Third Spiritual Alphabet by Francisco de Osuna (LINK) while calling on Mediations For All The Days of the YearFr. Andre-Jean Marie Hamon's book on meditations, St. Thomas, St. Abrose, St. Margaret Mary Alacoque.
I heartily recommend my readers to acquire a hard copy of the edition or review a slightly modified version at the link below.
The core message is this:
"If we fail to give thanks to God for the gifts we have received regardless of the circumstances in which we find ourselves the gifts themselves will grow stale and putregfy and, rather than serving as a means by which we can glorifying God and merit an eternal reward, our gifts themselves will produce rotten fruits and be the cause of our damnation."