I am trying to get my mind around something here, so I thought I would call out for those who may be smarter and/or more experienced than me to lend a hand. I think I have a good grasp on the concept of Hit Points -- how a cleric and a war horse can both have 35 hit points, but they mean something completely different. I get that it is just mechanics, but since I understand it I am able to describe it (the cleric just dodges the attack taking 5 hit points [luck/pulled muscle/shallow cut/etc.] while the horse takes a deep cut along its flank, but is not slowed by the attack).
But how does this work with healing spells? I can justify that a Cure Light Wounds spell doesn't work as well on a horse as a human (although that seems ridiculous, since it will work on a dog or fish to fully heal it), but why will it only restore 5% of a 20th level somebody while it will restore 100% of a 1st level somebody?
I know it is just the mechanics, but I need to have some attempt at understanding to portray it to the players. Does anyone have any ideas as to how to represent the mechanics of the cure spells so they are internally consistent?
Any advice/ideas are appreciated.