Let it be remembered then, that jealousy, like anger, is not evil in itself, or it could never be ascribed to God; His jealousy is ever a pure and holy flame. The passion of jealousy possesses an intense force, it fires the whole nature, its coals are juniper, which have a most vehement flame; it resides in the lowest depths of the heart, and takes so firm a hold that it remains most deeply rooted until the exciting cause is removed; it wells up from the inmost recesses of the nature, and like a torrent irresistibly sweeps all before it; it stops at nothing, for it is cruel as the grave (Cant. 8:6), it provokes wrath to the utmost, for it is the rage of a man, therefore he will not spare in the day of vengeance (Proverbs 6:34), and it overthrows everything in the pursuit of its enemy, for “wrath is cruel, and anger is outrageous; but who is able to stand before jealousy?” For all these reasons jealousy is selected as some faint picture of that tender regard which God has for His own Deity, honor, and supremacy, and the holy indignation which He feels towards those who violate His laws, offend His majesty, or impeach His character.
~ Charles Spurgeon.