Galatians 6:6-8

King James Version (KJV)

6Let him that is taught in the word communicate unto him that teacheth in all good things.
7Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.
8For he that soweth to his flesh shall of the flesh reap corruption; but he that soweth to the Spirit shall of the Spirit reap life everlasting.

If this is true, how does it fit in with the faith alone theology?