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
Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. 14 But small is the gate and narrow the road that leads to life, and only a few find it.