Praise be Sol our ancestral home, in its light does mankind thrive.
Praise be Terra under Sol, mother of Mankind and its Emperor's throne.
Praise be Luna of Terra born, cradle of his Primarchs and Space Marines.
Praise be Mars the Primeval Forge, where the Emperor was revealed anew.

It was a simple children's catechism, to remind them of the importance of Holy Terra and Solsys. It was strange though, of the many formal and ornate tech prayers he knew that Uriel should recite so basic a portion of the Imperial Creed.

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Move if I can to AS22