And I will put a division between my people and thy people: tomorrow shall this sign be. (Exodus8:23)
Pharaoh has a people, and the Lord has a people. These may dwell together and seem to fare alike, but there is a division between them, and the Lord will make it apparent. Not forever shall one event happen alike to all, but there shall be great difference between the men of the world and the people of Jehovah’s choice.
This may happen in the time of judgments, when the Lord becomes the sanctuary of His saints. It is very conspicuous in the conversion of believers when their sin is put away, while unbelievers remain under condemnation. From that moment they become a distinct race, come under a new discipline, and enjoy new blessings. Their homes, henceforth, are free from the grievous swarms of evils which defile and torment the Egyptians. They are kept from the pollution of lust, the bite of care, the corruption of falsehood, and the cruel torment of hatred, which devour many families.
Rest assured, tried believer, that though you have your troubles you are saved from swarms of worse ones, which infest the homes and hearts of the servants of the world’s prince. The Lord has put a division; see to it that you keep up the division in Spirit, aim, character, and company.
C.H. Spurgeon, Faith’s Checkbook