If you don't feel challenged, it's because you're not doing enough. Ballet should never feel comfortable. Comfortable is lazy! If you're comfortable when you dance, you're not pushing yourself hard enough. 100 % is not enough. You have to give 200%. One tendu takes years of hard work and will never be perfect. Everything in ballet is a challenge.
George BalanchineThe choreographer and the dancer must remember that they reach the audience through the eye. It's the illusion created which convinces the audience, much as it is with the work of a magician.
George Balanchine