ETYMOLOGY, THE ROOT MEANING OF WORDS “doctrine ” - late 14c., "the body of principles, dogmas, in a religion or field of knowledge," (12c.) from Latin doctrina "a teaching, body of teachings,🕎 Ephesians 4:14 KJV, Titus 1:13 KJV
ETYMOLOGY, THE ROOT MEANING OF WORDS “CHIVALRY” - c. 1300, "body or host of knights; knighthood in the feudal social system; bravery in war, warfare as an art," from Old French chevalerie "knighthood, chivalry, nobility, cavalry,”