It is not your aptitude, but your attitude, that determines your altitude.
Getting ahead in a difficult profession requires avid faith in yourself. That is why some people with mediocre talent but with great inner drive go much further than people with vastly superior talent.
Good character is more to be praised than outstanding talent. Most talents are to some extent a gift. Good character by contrast is not given to us. We have to build it piece by piece — by thought choice courage and determination.