4:8 God is love - This little sentence brought St. John more sweetness, even in the time he was writing it, than the whole world can bring. God is often styled holy, righteous, wise; but not holiness, righteousness, or wisdom in the abstract, as he is said to be love; intimating that this is his darling, his reigning attribute, the attribute that sheds an amiable glory on all his other perfections.

1 John 4:8 Parallel Commentaries

Love's Logic
But, dear friends, I trust after many years of instruction in the doctrines of our holy faith, I need not keep to the beaten doctrinal track, but may lead you in a parallel path, in which the same truth may be from another point. I purpose to preach an experimental sermon, and possibly this will be even more in accordance with the run of the passage and the mind of its writer, than a doctrinal discourse. We shall view the text as a fact which we have tested and proved in our own consciousness. Under …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 17: 1871

A Psalm of Remembrance
Let me add another figure to render this truth yet more apparent. Suppose an eloquent foreigner, from a sunny clime, should endeavour to make you appreciate the fruits of his nation. He depicts them to you. He describes their luscious flavour, their cooling juice, their delicious sweetness; but how powerless will be his oration, compared with your vivid remembrance, if you have yourself partaken of the dainties of his land. It is even so with the good things of God; describe them as we may, we cannot …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 5: 1859

Love
Can you imagine a being placed halfway between this world and heaven? Can you conceive of him as having such enlarged capacities that he could easily discern what was done in heaven, and what was done on earth? I can conceive that, before the Fall, if there had been such a being, he would have been struck with the singular harmony which existed between God's great world, called heaven, and the little world, the earth. Whenever the chimes of heaven rang, the great note of those massive bells was love; …
Charles Haddon Spurgeon—Spurgeon's Sermons Volume 5: 1859