Verily I say unto thee, To-day shalt thou be with Me in paradise. – Luke 23:43

Heaven and hell are not places far away. You may be in heaven before the clock ticks again, it is so near. Could we but rend that veil which parts us from the unseen! It is all there, and all near. “To-day,” said the Lord; within three or four hours at the longest, “shalt thou be with Me in paradise;” so near is it. A statesman has given us the expression of being “within measurable distance.” We are all within measurable distance of heaven or hell; if there be any difficulty in measuring the distance, it lies in its brevity rather than in its length.

Surely, if anything beyond faith is needed to make us fit to enter paradise, the thief would have been kept a little longer here; but no, he is, in the morning, in the state of nature, at noon he enters the state of grace, and by sunset he is in the state of glory. The question never is whether a death-bed repentance is accepted if it be sincere: If it be so, if the man dies five minutes after his first act of faith, he is as safe as if he had served the Lord for fifty years. If your faith is true, if you die one moment after you have believed in Christ, you will be admitted into paradise, even if you shall have enjoyed no time in which to produce good works and other evidences of grace. He that reads the heart will read your faith written on its fleshy tablets, and He will accept you through Jesus Christ, even though no act of grace has been visible to the eye of man. ~ C.H. Spurgeon

https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2078.cfm