People differ not only in their ability to do but also in their 'will to do'.
Competence, like truth, beauty and contact lenses, is in the eye of the beholder.
The differences between a competent person and an incompetent person are demonstrated in his environment (surroundings).
Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.