I just wonder how old "old Dad" is? I'm sort of old myself. I just like to discuss the word, and am very difficult to persuade about anything. New here, I'll just jump in.
Eph 4:14 that we may be no longer children, tossed to and fro and carried about with every wind of doctrine, by the sleight of men, in craftiness, after the wiles of error;
Tit 1:9 holding to the faithful word which is according to the teaching, that he may be able to exhort in the sound doctrine, and to convict the gainsayers.