This is the name of one of a series of short
fables by
G.E.Lessing. I have entered it in the original German as
Der Sperling und der Strauß. An (approximate!) English translation is below.
by G.E.Lessing
"Be as proud as you wish of your size, and of your strength," said the Sparrow to the Ostrich; "I am still more of a bird than you. For you cannot fly; I fly, though not high, though only by fits and starts."