Certainly from a decidedly 18th Century perspective, but describes the deserved punishment and God’s Mercy in not allowing instant justice:
God has put Himself under no obligation, has made no promise, to keep any unbelieving man out of hell for one second. God certainly has made no promises either of eternal life, or of any deliverance or preservation from eternal death, but only what are contained in the covenant of grace, the promises that are given in Christ, in whom all the promises are yes and amen…
Therefore natural men are held in the hand of God over the pit of hell; they have deserved the fiery pit, and are already sentenced to it; and God is dreadfully provoked, His anger is as great towards them as to those that are actually suffering the executions of the fierceness of His wrath in hell, and they have done nothing in the least to appease or abate that anger, neither is God in the least bound by any promise to hold them up one moment: the devil is waiting for them, hell is gaping for them, the flames gather and flash about them, and are eager to grab hold of them, and swallow them up; the fire pent up in their own hearts is struggling to break out; and they have no interest in any Mediator, there are no means within reach that can be any security to them. In short, they have no refuge, nothing to take hold of; all that preserves them every moment is the mere arbitrary will, and uncovenanted, unobliged patience, of an incensed God. ~Courtesy Jonathan Edwards c.1741