We do only periodically.
What we have is out there.
So, the most important thing is who we are.
And applied to Tai Ji, this means we must work on the connections between the defined parts of the form. As in Chinese painting the artist thinks of continuous physical movement as well as the picture which is emerging. Eventually we will be more aware of the movement of our muscles than of how our form looks - and we can assume that if the muscle movement is good so will the external form be.
Chew each part carefully, paying close attention to detail.
Eat the whole apple!
... I come from an economical country!