Mammering moldwarp

Fie! Yond distemperate, w'rkshy, bullying ov'rl'rd hast spoken.  
Whilst t's most wondrous to treateth oth'rs with kindness  
and repay evil with marry,  
doth not alloweth yourself beest hath caught
being valorous f'r nay reward.  
 
That flap-drag'n hast declar'd it presumptuous
to off'r holp wh're't did need.  
One needeth to knoweth one's standing,
and to assisteth is to receiveth ideas above one's prov'rbial.  
 
Th'ref're, shouldst a friend requesteth  
thee transporteth an issue to their sakbut class
'r dropeth those folk at danceth as thee walketh past
'r sup'rvise as those bantlings consume their midday rations,
then returneth them to their school cubiculo,
thee shouldst answ'r only 'nay'.  
 
Abandon the issue in needeth;
leaveth oth'rs to their w'rk
and concentrateth on thy owneth job.  
Thou art th're to instructeth youngst'rs
in the art of a'rophone
and any attempt to doth aught else
shall beest met with suspicion.  
 
Hark to the unwise w'rds of the empty-head'd ov'rl'rd;
hark well and obeyeth
and all shalt beest well with the w'rld.