That is a word that is used in greeting and parting. It basically means "the Divine in me recognizes the Divine in you." We all have the Divine in us and that makes us part of the Divine. We are of divinity, so we are divinity. This is not to say that the One, God, Spirit is equal to us, however. We may all be parts of the Divine Source, but it is greater than the sum of all its parts. Nonetheless, we are little 'gods', with little 'g's and big odds.
Jesus began his prayer, "Our Father who art in Heaven..."
Jesus also said that the Kingdom of Heaven was within us.
Therefore, our Father is within us. God is within us, each and every one. Psalm 82:6 quotes God, "Have I not said, ye are gods...all of you are children of the Most High."
When you come to realize the divinity within yourself and every person, you will begin to see the unity that was before hidden. Being part of the One, we are One. Knowing this, experiencing this, you lose your fears, your anger, your hurt and all those things that separate you from the Kingdom of Heaven waiting inside of you. You will love your enemy because your enemy is you and there is no reason not to love yourself. For you are divine.