What is this "sound doctrine" that the legalist love to claim they have? Lets see...
b>Who hath saved us, and called us with an holy calling, not according to our works, but according to his own purpose and grace, which was given us in Christ Jesus before the world began,
10 But is now made manifest by the appearing of our Saviour Jesus Christ, who hath abolished death, and hath brought life and immortality to light through the gospel:
11 Whereunto I am appointed a preacher, and an apostle, and a teacher of the Gentiles.
12 For the which cause I also suffer these things: nevertheless I am not ashamed: for I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day.
13 Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.
not this:
rom which some having swerved have turned aside unto vain jangling;
7 Desiring to be teachers of the law; understanding neither what they say, nor whereof they affirm.