Deuteronomy 11:7

Your eyes have seen Some of them had seen all the great things done for them in Egypt, and at the Red sea, and in the wilderness; and all of them had seen some of his mighty acts in their behalf. As if he had said, You yourselves have had experience of God's goodness and power, and therefore you should be the more affected therewith. What our eyes have seen, especially in our younger days, should be improved by us long after.