Does kindness shown incur no debt?
You blame your words, you were upset;
You've cursed the hand that fed you food
And excused your acts by your foul mood;
Did she who offered gentle words
Who took your part through facts absurd,
Who questioned bruises with concern
And hoped some day that you would learn;
Who takes you in when you're expelled,
Who mothered fears and nightmares quelled,
Does she not merit equal fare,
The one who sought your soul's repair?
You answer cruelly behind her back,
Ill-tempered sneers meant to attack;
How long does patience nobly stand,
Not turn away, withdraw its' hand?
Does kindness shown incur no debt?
You infect pure goodness with regret.

David McLansky

http://www.poemhunter.com/poem/ingratitude-6/