Three great wonders in heaven!

The following is from Spurgeon's sermon,

Sin and suffering are indissolubly bound together-
It is right that evil should be punished.

What wonders of grace shall we be if, from a judgment which
we have so richly deserved, we shall be rescued at the last!
Vengeance must sheath her sword, until love has housed its darlings.
Salvation never shines so brightly to any man's eyes as when it
comes to 'himself'. Then is grace illustrious indeed when we can
see it working with divine power upon ourselves. To our apprehension,
our own case is ever the most desperate, and mercy shown to us is the
most extraordinary. We see others perish, and wonder that the same
doom has not befallen ourselves. The horror of the ruin which we
dreaded, and our intense delight at the certainty of safety in Christ
unite with our personal sense of unworthiness to make us cry in
amazement, "I by sovereign grace, am spared while others perish."
Indeed, each saved man is a marvel to himself.

Nobody here wonders more at divine grace in his salvation than I
do myself. Why was I chosen, and called, and saved? I cannot make
it out, and I never shall. But I will always praise, and bless,
and magnify my Lord for casting an eye of love upon me.

Will you not do the same, beloved, if you feel that you by grace
are saved? Will you not fall on your face and bless the mercy
which makes you to differ?

"Why was I made to hear your voice,
And enter while there's room,
When thousands make a wretched choice,
And rather starve than come?"
There will be three great wonders in heaven--

First, to see so many there whom we never expected to meet
in glory. Secondly, to miss so many of whom we felt sure that
they must be safe. And thirdly, the greatest wonder of all
will be to find ourselves there.

I am sure that everyone who has a hope of being in glory
feels it to be a marvel; and he resolves, "If I am saved,
I will sing the loudest of them all, for I shall owe most
to the abounding mercy of God."