Matthew Poole and continuators on John 8:32

32 And ye shall know the Truth , and the truth, shall make you free .

That is, you shall more fully and clearly know the Truth; by which may be either understood Christ, who stileth himself, The way, the truth, and the life; or those Propositions of Truth which Christ hath Revealed. There must be some knowledge of Truth in a Soul before it can believe; for how shall they believe (saith the Apostle) in him of whom they have not heard? but a fuller and clearer knowledge of the Truth is got by degrees, by those who studiously seek after it, and walk close with God.

And the truth shall make you free. It appears by ver. 36. That by the Truth, he means himself; there he saith, If the Son make you free: and indeed, though the knowledge of the Proposition of Truth, gives men some liberty from the bondage of ignorance, and some Lusts, yet it is onely the saving knowledge of Christ, which brings men into a perfect liberty from the Law, the rigour, curse, and terror of it, and from the dominion of Sin and Corruption.

Marginal references: Rom. 6.18.