Knowing lots of information is something good. However, knowing what to do with this information is the key of success, it is the Knowledge.
I remember my first training course in primavera 3, this course taught me lot of information about the primavera capabilities and characteristics. However, I did not know by this time how to create a time schedule using primavera; I recognized that having the information is not enough; I need the knowledge as well.
When I saw this photo for the first time, it drew my full attention, it really worth 1000 words.