It is the character that develops consistency. It is the inner strength that gives the ability to perform constantly and continuously.
We got to have the ability and the inner strength to perform or keep performing our action and work no matter how worse the situations is. This is what consistency is. And for this we got to develop the same kind of determined character. Nobody can go beyond the limitation of their own character.
Our character is important in achieving great success. Character generates consistency, consistency develops trust (self or the people in the organization), trust develops progress, and progress is what success is.