On this, my 65th birthday, I just read that I must
Take mental journeys that will stretch [my] mental muscles, and realize that each human intellect is only one out of approximately  billion souls in incarnation upon this Earth. Our Earth is one of the smallest in our solar system. Our system is only an atom in the galaxy to which we belong, and there are galaxies of galaxies. The Magic Presence, 1935, p. 339.