Intelligence is like a compass, in that it allows you to go a specific direction but is only useful in the context of the wilderness that you stand within. Without knowing where you are and where you are going, a compass will only help you stay the course towards an unknown destination. Wisdom is the map upon which the compass lies, that which gives sustained direction the context it needs to ensure the intended destination is reached.

Blazed is the trail made by their mistakes
 
The high road created for all our sakes
 
Explorers of lands that were once uncharted
 
Now the cartographers of the paths they started
 
We are the proverbial parchment upon which they sketch
 
Vicariously imbuing their wisdom within each etch
 
The end of their journey is where we begin
 
For the trail ahead must be blazed again

We cannot become successful and produce true joy by having confidence in ourselves. How can we?

Does a captain drop anchor on the deck of his ship?

Is a house built upon its own structural foundation?

Does a tree hold fast with roots that grow above the earth?

Everyone and everything depends upon something deeper and more profound than itself for stability. It would be paradoxical and against our nature to assume otherwise. I know that I could never live up to my own expectations. No, I do not put confidence in myself, my confidence is in a Man who did live up to every expectation for me and yet died a death that I should have died.