I heard this one on the radio one morning...
A man entered a monastery and took a vow of silence, limited to speaking two words every ten years.
At the end of the tenth year, the abbott called the monk to his office and asked him what he would like to say. The monk replied, "Bed hard."
At the end of the twentieth year the abbott again asked the monk for his words. The monk replied, "Food bad."
At the end of the thirtieth year the abbott again asked the monk for his words. The monk replied, "I quit!"
"Good," said the abbott. "You've done nothing but complain ever since you got here!"