We love Him because He first loved us. -1 John 4:19

Did anybody ever say of any one of us here, “Behold how he loves Christ”? If someone did say that of you, my brother or sister, was it true? I think I hear your answer, ” Oh, I do love Him! He knows all things, and He knows that I love Him.” But do you love Him so fervently that strangers or even your more intimate acquaintances would say of your love to Jesus what the Jews said of His love to Lazarus, “Behold how He loved him”? “I wish,” says one, “I could do so.” Then listen while I tell you of what some saints have done to show how they have loved their Lord.

There have been those who have suffered for Christ’s sake. They have lain in damp dungeons, and have refused to accept liberty at the price of treachery to their Lord and His truth. They have been stretched upon the rack, yet no torture could make them yield up their fidelity to God. If you have read Foxe’s Book of Martyrs, you know how hundreds of brave men and women, and children too, stood at the stake, gloriously calm, and often triumphantly happy, and were burnt to death for Christ’s sake, while many of those who looked on learnt to imitate their noble example, and others who heard their dying testimonies, and their expiring songs, (not groans,) could not help exclaiming, “Behold how these martyrs love their Master!”

There have been others, who have shown their love to their Lord by untiring and self-sacrificing service. They have laboured for Him, at times, under great privations and amid many perils, some as missionaries in foreign lands, and others with equal zeal in this country. Their hearts were all aglow with love for their dear Lord and Saviour, and they spent their whole time and strength in seeking to win souls for Him, so that those who knew them could not help saying, “Behold how they love their Lord!” Some of us can never hope to wear the ruby crown of martyrdom, yet we may be honoured by receiving the richly-jewelled crown from the hand of Christ ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/3228.cfm