We never know how high we are (1176)
We never know how high we are Till we are called to rise; And then, if we are true to plan, Our statures touch the skies— The Heroism we recite Would be a daily thing, Did not ourselves the Cubits warp For fear to be a King—
In Just
by e.e. cummings

Read more at http://www.poetry-archive.com/c/in_just.html#uE2J0H2vlQdiUaAS.99