To repeat what others have said, requires education; to challenge it, requires brains.
Mary Pettibone Poole
While mere education may bring you a steady income or even financial wealth in a long-term it will most certainly fail to bring you happiness and satisfaction.
Use your brains, think and question. Do not be stupid.
/phil
Motivatingdaily - Your source for daily motivation 
This is very true. I like to think of education and being smart as two separate things. Education teaches you about school. Being smart is a whole other thing.