You build on failure. You use it as a stepping stone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.
For us Africans, literature must serve a purpose: to expose, embarrass, and fight corruption and authoritarianism. It is understandable why the African artist is utilitarian.