Authors:

It is easy to tell the toiler How best he can carry his pack But no one can rate a burden's weight Until it has been on his back

Ella Wheeler Wilcox (2012). “Leafs On An Idle Breeze - My Inspirational Poems (Annotated Edition)”, p.82, Jazzybee Verlag
It is easy to tell the toiler How best he can carry his pack But no one can rate a burden's weight Until it has been on his back