Aesop

“ And he took the Jackdaw, and clipped its wings and carried it home to his children. It looked so odd that they didn’t know what to make of it. “What sort of bird is it, father?” they asked. “It’s a Jackdaw,” he replied, “and nothing but a Jackdaw: but it wants to be taken for an Eagle.”
If you attempt what is beyond your power, your trouble will be wasted and you court not only misfortune but ridicule. ”