As he notes, Christ teaches us externally by his word and then goes on to teach the sacred mysteries, inwardly, by the Spirit. Were it not for our benefactor in Christ, we would be left on our ownsome, unwilling to learn and unable to make our own way into the spiritual kingdom of our Lord and our Christ. Yes, we have all heard the gospel claims of the Scriptures, some have even studied them to some claim of worldly knowledge. However, unless these sacred mysteries be taught inwardly by the Spirit, we would be lost forever and ever. We have only to look at the colossal calamity of the Genesis project on the worldly channels of PBS to see the total lack of spiritual understanding of mere biblical knowledge.
Village idiot is probably too kind of a word to use for such misguided philosophers.
Now, that observation may be well and good, but how are we to know that we have the mind of Christ in these spiritual matters. Thomas Watson gives us three lessons so that we may appreciate the spiritual knowledge that we truly have. First , through the Scriptures and the Spirit, Christ as our prophet teaches us to see into our own hearts. And there we are enabled to see the base corruption, the lusting after sin and vain thoughts that prove the true lost nature of our souls. Compare that attitude with the worldly crowd with the insistence that the best way to deal with guilt is to legalize every sin possible.