John 10:30—Was Christ one with the Father?

Problem: Jesus said here, “I and My Father are one.” But on other occasions He distinguished Himself from the Father, saying “I came forth from the Father and ... I leave the world and go to the Father” (John 16:28). Further, He prayed to the Father as one person to another (John 17), and even said, “the Father is greater than I.”

Solution: Jesus was one with the Father in nature, but distinct from Him in person. The triune Godhead has one essence, but three distinct persons

Expanded from John 14:28:
John 14:28—Did Jesus think of Himself as less than God?

Problem: Christianity confesses Jesus is both fully man and fully God. Yet Jesus said in John 14:28, “My Father is greater than I.” How can the Father be greater if Jesus is equal to God?

Solution: The Father is greater than the Son by office, but not by nature, since both are God (see John 1:1; 8:58; 10:30). Just as an earthly father is equally human with, but holds a higher office than, his son, even so the Father and the Son in the Trinity are equal in essence, but different in function. In like manner, we speak of the president of our country as being a greater man, not by virtue of his character, but by virtue of his position. Therefore, Jesus cannot ever be said to say that He considered Himself anything less than God by nature. The following summary helps to crystalize the differences:

. So, Jesus was both the same in substance and yet was a different individual from the Father.