From what size are they worthy of our sympathy and help? A fly isn't yet, nor a moscito. Nor is a caterpillar. Concerning a mouse, still much of a question. Take a bird, and many hearts will be touched. Depends on their aptitude, on sweetness in the impression they make. Agreeability, aesthetics and touchingness play a role, too. But we are, equally, God's trapped flies, mosquitos that bite him on his cheek, spiders setting nets in his apartment, mean poachers in the woods of his kingdom. A lion to us isn't even a ladybug to Arcturus.