If there be a doctrine that should win over the most incredulous by its charm and its beauty, it is that of the existence of spirit-protectors, or guardian-angels. To think that you have always near you beings who are superior to you, and who are always beside you to counsel you, to sustain you, to aid you in climbing the steep ascent of self-improvement, whose friendship is truer and more devoted than the most intimate union that you can contract upon the earth-is not such an idea most consoling? Those beings are near you by the command of God. It is He who has placed them beside you. They are there for love of Him, and they fulfil towards you a noble but laborious mission. They are with you wherever you may be; in the dungeon, in solitude, in the lazar-house, even in the haunts of debauchery. Nothing ever separates you from the friend whom you cannot see, but whose gentle impulsions are felt, and whose wise monitions are heard, in the innermost recesses of your heart.
Allan Kardec