Using many examples from St. Augustine, Dr. Mitchell Kalpakgian shows how we can fall into what he describes as "fornication of the mind", in this essay for Truth and Charity Forum, "The Use and Abuse of the Mind."
Geometry, the basis of beautiful medieval design? Yes, as a swordsmith explains in "Higher Understanding and Deeper Reckoning".
"The Ten Commandments of Clean Communication": Here is an excellent refresher on positive communication from Art of Manliness. It provides clear examples of the wrong way to say something, followed by the correct way and is especially helpful for discussing delicate situations with one's spouse or children.
