You cannot fly like an eagle with wings of a wren.

The reason birds can fly and we can't is simply that they have perfect faith, for to have faith is to have wings

You can put wings on a pig, but you don't make it an eagle.

Fool that I was, upon my eagle's wings I bore this wren, till I was tired with soaring, and now he mounts above me.

For thus saith the LORD; Behold, he shall fly as an eagle, and shall spread his wings over Moab.

You can put wings on a pig, but you don't make it an eagle.