The runaway thread on the new Psionics UA got me thinking about how could we differentiate arcane and divine Magic from each other more. Traditionally, divine Magic users "know" all their spells, and just choose from them each day. Arcane magic users have to learn their spells, either through their book like wizards or through level up like the sorcerer (Baldur's Gate's Bard, which I assume was like 2E's, learned from scrolls while 3 and 5Es bard learns like a sorcerer).
Psioncs fans want Psionics to be different, but how could we go about making divine Magic more different than arcane magic? How would you go about making it feel more spiritual?