Gratitude is the hearts memory. – Proverb

This race is never grateful: from the first, One fills their cup at supper with pure wine, Which back they give at cross-time on a sponge, In bitter vinegar. – Elizabeth Barrett Browning

Gratitude is the music of the heart, when its chords are swept by the breeze of kindness. – Author Unknown

There is no such thing as gratitude unexpressed. If it is unexpressed, it is plain, old-fashioned ingratitude. – Robert Brault, rbrault.blogspot.com