Life's Lessons: What would your priority in life be?

First, he put rocks inside the jar till it was filled. He then put the pebbles which filled up the gaps in between the rocks. He asked the students if the jar was filled and they answered yes. Finally, he added sand into the jar which filled up the tiny spaces. The professor explained that the experiment was done to show how one should set their priorities in life. He said that the rocks represent family while pebbles resemble career and sand is quarrels and ego. He stated that if the sand is added first, it would fill up the jar, leaving no space for others.