For nailing something on wall requires a know-how , how to hit the hammer , but its more important to know where to hit the hammer.
Staying hungry for the knowledge and having humbleness in attitude is what makes a person a great. All knowledge in the world can’t be known to a single person. So it is very very important that we keep our ears and minds open ( keeping our selves foolish) to gain knowledge.
Once we gain knowledge we actually starts knowing where to hit the hammer and at the end of the day we want whatsoever we have nailed on wall looks good in the room.