LIV. The sun seemeth to be shed abroad. And indeed it is diffused but not effused. For that diffusion of it is a τάσις or an extension. For therefore are the beams of it called ἀκτῖνες from the word ἐκτείνεσθαι to be stretched out and extended. Now what a sunbeam is, thou mayest know if thou observe the light of the sun, when through some narrow hole it pierceth into some room that is dark. For it is always in a direct line. And as by any solid body, that it meets with in the way that is not penetrable by air, it is divided and abrupted, and yet neither slides off, or falls down, but stayeth there nevertheless: such must the diffusion in the mind be; not an effusion, but an extension. What obstacles and impediments soever she meeteth within her way, she must not violently, and by way of an impetuous onset light upon them; neither must she fall down; but she must stand, and give light unto that which doth admit of it. For as for that which doth not, it is its own fault and loss, if it bereave itself of her light.