Seems to very confusing right ?
Same reaction from mine first time !
When I googled I found very nice thought from the different people.
http://neutroncytoplasma.blogspot.com/2006/08/mental-qualities-and-difference.html. I would give 10/10 for this blog.
He tells how meditation can be used to increase your wisdom and letter the most important
"Common Sense " which is very uncommon.