Sermon to the Birds- Francis of Assisi (about 1220)

My little sisters, the birds, much bounden are ye unto God, your Creator, and always in every place ought ye to praise Him, for that He hath given you liberty to fly about everywhere, and hath also given you double and triple raiment; moreover He preserved your seed in the ark of Noah, that your race might not perish out of the world; still more are ye beholden to Him for the element of the air which He hath appointed for you; beyond all this, ye sow not, neither do you reap; and God feedeth you, and giveth you the streams and fountains for your drink; the mountains and valleys for your refuge and the high trees whereon to make your nests; and because ye know not how to spin or sow, God clotheth you and your children; wherefore your Creator loveth you much, seeing that He hath bestowed on you so many benefits; and therefore, my little sisters, beware of the sin of ingratitude, and study always to give praises unto God.

This sermon has been attributed to the credit of Francis of Assisi and is considered a good and formidable example of sermon of gratitude. Attitude of gratitude leads to heaven and brings heaven unto you while the wages of ingratitude leads to your doom and that is in another term called hell.