In the light of the Word of God as a whole, and especially to the epistle Romans itself it is clear that Paul here refers not to the content of the gospel but simply to the fact that God had predicted that He had wonderful good news in store for mankind. This is complemented by 1 Corinthians 2:9-10, referring here to Isiah 64:4 the apostle says; But as it is written, eye hath not seen nor ear heard neither have entered into the heart of man, the things that God had prepared for them that love Him.