Our fathers understood not Thy wonders in Egypt; they remembered not the multitude of Thy mercies… – Psalm 106:7
Beyond all question, (the Israelites) ought to have recognized Jehovah’s love to them. By so much as the plagues were terrible to Egypt, they were gracious to His people. Though the Israelites were a race of down-trodden slaves the Lord loved them. He moved heaven and earth to liberate them: He not only made the very dust of Egypt alive for them, but He sent swift angels out of heaven to avenge the wrongs of His chosen. The orbs of heaven and the creatures of earth—all were brought to bear upon God’s great purpose of grace towards Israel. Truly said the Lord, “I gave Egypt for thy ransom: Ethiopia and Seba for thee.” It was love, wondrous love to Israel, which made the Lord to show His signs in Egypt, His wonders in the land of Ham. Why did they not become lovingly obedient in return for such favors? Why were they hard of heart, and stiff of neck, and unwilling to be led of the Lord their God? Alas! they understood not what the Lord was doing for them.
To you, beloved, it may be that the same fault can be laid. God has done great wonders for believers; but it may be, we have not yet learned His power so as to trust His might; nor His sovereignty, so as to submit to His will; nor His love, so as to rejoice in His faithfulness. Alas! we have but little understanding; nay, worse, we have none at all except as the Lord, the Holy Spirit, teaches us to profit, and instructs us, as children are instructed. ~ C.H. Spurgeon
https://www.blueletterbible.org/comm/spurgeon_charles/sermons/2204.cfm