Turn the question around: Can the natural man hear and understand the Word of God or is it "foolishness" to him?
Let the Scriptures answer your question:
"We have not received the spirit of the world, but the Spirit who is from God, that we may understand what God has freely given us."
"The man __without the Spirit__ does not accept the things that come from the Spirit of God, for they are foolishness to him, and he cannot understand them for they are spiritually discerned."
1 Cor. 2:12, 14.