A gorgeously animated allegory for the different states and conditions of faith and lack there of, which arcs its character in such a way that suggests divinity need be tempered by certain human emotions in order to be motivated and practical enough to repel evil. Voice acting can be hit or miss (Angela Lansbury does wickedly well in her part), but everything comes together pretty okay on the whole.
Another good animated fantasy classic - America's soundtrack sounds so nice it'd make me shed a tear or two, the animation on the Unicorn & Lady Amalthea is wonderful, the entire voice castings had some good choices to portray, and parts of it were made in Japan as well. I now would like to read the original novel next. (Awesome transformation scene near the end, btw.)
"And darling, we will be fine; but what was yours and mine appears to me a sandcastle that the gibbering wave takes. But if it’s all just the same, then will you say my name; say my name in the morning, so that I know when the wave breaks. I wasn’t born of a whistle, or milked from a thistle at twilight. No; I was all horns and thorns, sprung out fully formed, knock-kneed and upright."