I find this a common characteristic of zealous brethren who are learning the scriptures. One tonic is where Peter tells us to add to our faith, virtue; and to virtue, knowledge; and to knowledge, temperance; and to temperance, patience; and to patience, godliness; and to godliness, brotherly kindness.
2) They are convinced that Paul and or some of the Apostles set the Canon of the OT.I think a large part of the issue is a predetermined faith in the doctrine of Sola Scriptura. Once locked into that, there are problems; larger to me is the inability if nonCatholics to settle on a Greek version if the New books, let alone the Old books or an English translation of either. Catholics do not face this doctrinal dilemma.
A friend o f mine keeps telling me: You can't fix red or stupid.
That seems wrong to me. We can all be stupid. The parable of the Ten Virgins lies before us. With God all things are possible, and by His grace we can avoid being stupid, foolish, or ashamed at His coming. Any of us can stumble and fall; God resists the proud but gives grace to the humble, and we all need grace. Sola Gracie.
And to brotherly kindness, love; chesed and ahava in Peter’s tongue.