Joseph Smith changed the 14th Psalm from reading: “The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good.” To read instead: “The fool has said in his heart, There is no man that has seen God because he shows himself not unto us, therefore there is no God. Behold, they are corrupt. They have done abominable works and none of them does good.”
This is a profound change that recasts the problem from skepticism about God’s existence to skepticism about any message of God showing Himself to anyone.
Joseph also changes “Oh that the salvation of Israel were to come out of Zion!” to read instead: “Oh that Zion were established out of Heaven, the salvation of Israel. O Lord, when will you establish Zion?”
Another profound change that recasts the the origin of salvation itself. Zion is to be established out of heaven. And the Lord will establish it.
The Joseph Smith revisions of the scriptures make numerous small, but often profound, changes.