But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love Him. -1 Corinthians 2:9

We think a Christian gets a gaze of what heaven is when, in the midst of trials and troubles, he is able to cast all his care upon the Lord because He careth for him. When waves of distress and billows of affliction pass over the Christian there are times when his faith is so strong that he lies down and sleeps though the hurricane is thundering in his ears and though billows are rocking him like a child in its cradle, though the earth is removed and the mountains are carried into the midst of the sea, he says, “God is our refuge and strength, a very present help in trouble.” Famine and desolation come; but he says, “Though the fig tree shall not blossom, neither shall there be fruit on the vine, though the labour of the olive shall fail, and the field shall yield no increase, yet will I trust in the Lord, and stay myself on the God of Jacob.” Affliction smites him to the ground; he looks up, and says, “Though He slay me, yet will I trust in Him.” The blows that are given to him are like the lashing of a whip upon the water, covered up immediately, and he seems to feel nothing. It is not stoicism; it is the peculiar sleep of the beloved. “So He giveth His beloved sleep.” Persecution surrounds him; but he is unmoved. Heaven is something like that; a place of holy calm and trust:

“That holy calm, that sweet repose,
Which none but he who feels it knows.
This heavenly calm within the breast
Is the dear pledge of glorious rest,
Which for the church of God remains,
The end of cares, the end of pains.”

~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0056.cfm