Heaven, hev''n, (probably signifying that which is heaved up, or elevated), in a physical sense, the azure vault which spreads above us like a hollow hemisphere and appears to rest on the earth at the horizon. It is really the appearance presented to us by the immeasurable space in which the heavenly bodies move, and the azure color is due to the presence of particles of dust in the air. In theology, this word denotes a region of the universe where God's presence is especially manifested, in contrast with the earth. Among Christians the opinion has been that heaven is the residence of the Most High, the holy angels and the spirits of just men made perfect, that this abode is eternal and its joys intensely spiritual. The expression of Jesus, "The kingdom of heaven is within you," has led to the idea that heaven is a pure, spiritual condition of mind.