Brihadaranyaka Upanishad 1.5.13

1.5.13

athaitasya prāṇasyāpaḥ śarīraṃ jyotīrūpamasau candrastadyāvāneva prāṇastāvatya āpastāvānasau candrasta ete sarva eva samāḥ sarve'nantāḥ sa yo haitānantavata upāste'ntavantam̐ sa lokaṃ jayatyatha yo haitānanantānupāste'nantam̐ sa lokaṃ jayati

Water is the body of this vital force, and that moon is its luminous organ. And as far as the vital force extends, so far extends water, and so far does that moon. These are all equal, and all infinite. He who meditates upon these as finite wins a finite world, but he who meditates upon these as infinite wins an infinite world.