How do we know that human free will is a lie?

The sermon discusses how Paul rebukes the Galatians for being removed from the true Gospel by embracing teachings that incorporate human free will. It posits that any notion of free will regarding salvation undermines the sovereign grace of God. Paul asserts in Galatians 3 that righteousness does not come from our efforts or will, but through faith in Christ. By emphasizing God's sovereignty, we recognize that salvation is entirely His work and not contingent on human decisions or merits, thus confirming that free will, in this context, is a false concept.