Who can be ignorant how much the heron and the hawk surpass all other birds in the swiftness of their flight? But an ostrich has the likeness of their wing, but not the celerity of their flight.nFor it cannot in truth rise from the ground, and raises its wings, in appearance as if to fly, but yet never raises itself from the earth in flying. Thus, doubtless, are all hypocrites, who, while they simulate the conduct of the good, possess a resemblance of a holy appearance, but have no reality of holy conduct.
–Saint Gregory the Great (c. 540-604)
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