Complex sentence: In the discourse, Jesus fulfills and reinterprets the Old Covenant and in particular its Ten Commandments, contrasting with what "you have heard" from others, e.g. turning the other cheek compared to taking an eye for an eye.
Split into simpler sentences: In the discourse, Jesus fulfills and reinterprets the Old Covenant and in particular its Ten Commandments, contrasting with what "you have heard" from others. For example, he advises turning the other cheek as opposed to taking an eye for an eye.