"Acedia" n. "spiritual or mental sloth; apathy." From Gr. "listlessness; without care." (From The New Oxford American Dictionary)
"As acedia, boredom is one of the Seven Deadly Sins. It deserves the honor. You can be bored by virtually anything if you put your mind to it, or choose not to. You can yawn your way through Don Giovanni or a trip to the Grand Canyon or an afternoon with your dearest friend or a sunset. There are doubtless those who nodded off at the coronation of Napoleon or the trial of Joan of Arc or when Shakespeare appeared at the Globe in Hamlet or Lincoln delivered himself of a few remarks at Gettysburg. The odds are that the Sermon on the Mount had more than a few of the congregation twitchy and glassy-eyed. To be bored is to turn down cold whatever life happens to be offering you at the moment. It is to cast a jaundiced eye at life in general including most of all your own life. You feel nothing is worth getting excited about because you are yourself not worth getting excited about. To be bored is a way of making the least of things you often have a sneaking suspicion you need the most. To be bored to death is a form of suicide."
(Frederich Buechner, The Sacred Journey)
Check out Bryan Wilkerson's message on "Sloth? Seriously?" here.
XKCD cartoon permalink here.