Imbodied spirits constitute the mankind. It is not restricted to the earth only but instead it inhabits all the worlds in space.
Allan KardecThe more clearly a principle is understood by the intellect, the more inexcusable is the neglect to put it into practice.
Allan KardecPrayer is always acceptable to God when dictated by the heart, for the intention is everything in his sight; and the prayer of the heart is preferable to one read from a book, however beautiful it may be, if read with the lips rather than with the thought.
Allan KardecIn order to cooperate in the material worlds as agents of a divine power, the spirits temporarily have a material body. By the work required in their corporeal lives, the spirits improve their intelligence and, by observing God's law, they acquire the merits which will lead them to eternal happiness.
Allan Kardec