Good and Bad Children
by Robert Louis Stevenson

Children, you are very little,  And your bones are very brittle;  If you would grow great and stately,  You must try to walk sedately.  You must still be bright and quiet,  And content with simple diet;  And remain, through all bewild'ring,  Innocent and honest children.  Happy hearts and happy faces,  Happy play in grassy places--  That was how in ancient ages,  Children grew to kings and sages.  But the unkind and the unruly,  And the sort who eat unduly,  They must never hope for glory--  Theirs is quite a different story!  Cruel children, crying babies,  All grow up as geese and gabies,  Hated, as their age increases,  By their nephews and their nieces.