Sometimes when believers look around them and see such sin and hurt, they get very discouraged. Verse 4 should make our hearts leap for joy when we read it. It tells us that men have not heard nor seen what God has prepared for those who wait for Him.
In this world of doom and gloom, the child of God can still have a smile because we know that things won't always be like this. I believe what verse 4 says. I don't believe the human mind could even begin to comprehend the beauty and glory that awaits us in Heaven. Imagine someday going to live in a place where there is no night, no pain, sorrow or sin. A place where all is peace and joy and where you will never see another funeral procession. Glory to God!
There will be no graves on the hillside of glory. The best thing of all is that we will finally be at home with Jesus and see Him face to face. What a glorious hope awaits the child of God.