Satan said:
You will become like God, if you eat of the tree of knowledge of good and bad. (Genesis 3:1-5)
Jesus said:
You will become like God, if you love both good and bad people alike. (Mathew 5:44-48)
What Satan and Jesus said is one and the same thing—we can become like God, if we fulfill one condition. Trying to become like God is not a sin, but is the very purpose of life, and is the ultimate spirituality.
By retelling exactly what Satan supposedly said, Jesus was actually rejecting the Satan account as given in Genesis. Jesus is not aware of the theory that all humans became sinners when first parents became sinners. He knew some are righteous, hence does not need a saviour. Hence he declared: “I came to call sinners, not the righteous.” (Luke 5:32) He was only echoing an earlier statement in the OT: ‘The righteous do not need an external saviour.’ (Habakuk 2:4) His stand will remain unchanged even when he comes second time: (Mathew 16:27)