Is all Scripture inspired by God? Bible Contradictions

This Bible contradiction is from the Skeptic's Annotated Bible.

Verses

All scripture [is] given by inspiration of God, and [is] profitable for doctrine, for reproof, for correction, for instruction in righteousness:

But to the rest speak I, not the Lord: If any brother hath a wife that believeth not, and she be pleased to dwell with him, let him not put her away.

Now concerning virgins I have no commandment of the Lord: yet I give my judgment, as one that hath obtained mercy of the Lord to be faithful.

If I have done well, and as it becometh the history, it is what I desired: but if not so perfectly, it must be pardoned me.