Just a bit more on angels and caterpillars, allegedly from Meister Eckhart:

If I spent enough time with the tiniest creature–even a caterpillar–I would never have to prepare a sermon, so full of God is every creature.  (from “A Sappath Poem”) 

If God told an angel to go to a tree and pluck caterpillars off it, the angel would be quite ready to to so, and it would be his happiness, if it were the will of God.

(I suppose the second one comes into the category of gardening, rather than the love of all creatures!)