New Year: Rocks, Pebbles and Sand

I read this story many years ago. I loved it then. I love it now. It really does signify how I like to live my life. Of course, no one is perfect and even now I make a lot of mistakes. I've made a lot of mistakes in the past. But I like to look upon them as lessons. It's only a mistake if you don't learn from it.

So, Happy New Year (it is year and not years...unless you're special and several years attack you at once), take care of the big rocks first, pebbles when you can, and forget the sand.
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A philosophy professor stood before his class and had some items in front of him. When the class began, wordlessly he picked up a large empty mayonnaise jar and proceeded to fill it with rocks, rocks about 2" in diameter. He then asked the students if the jar was full?