Romans 8:39

nor exaltation, nor deepest depression, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

1 Peter 1:7

that the test of your faith (much more precious than that of gold, which is of a perishing nature, though proved by fire) may be found unto praise and honour and glory at the revelation of Jesus Christ:

Treasury of Scripture Knowledge

Summary

The heaven for height, and the earth for depth, and the heart of kings is unsearchable.

Heaven

Is unsearchable

Bible References

Heaven

Romans 8:39
nor exaltation, nor deepest depression, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord.

Is unsearchable

1 Peter 1:7
that the test of your faith (much more precious than that of gold, which is of a perishing nature, though proved by fire) may be found unto praise and honour and glory at the revelation of Jesus Christ: