'Neighbour' in the Bible

But he answering said, Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength, and with all thine understanding; and thy neighbour as thyself.

But he, desirous of justifying himself, said to Jesus, And who is my neighbour?

Which now of these three seems to thee to have been neighbour of him who fell into the hands of the robbers?