'Expert' in the Bible

Just then an expert in the law stood up to test Him, saying, “Teacher, what must I do to inherit eternal life?”

The expert answered, "Love the Lord your God with all your heart, with all your soul, with all your strength, and with all your mind, and love your neighbor as yourself."

But the expert, wanting to justify himself, said to Jesus, "And who is my neighbor?"

The expert in religious law said, "The one who showed mercy to him." So Jesus said to him, "Go and do the same."