People
I know my limitations. I could never make it as a writer, and I could never make it as a fine artist. Thus the world of cartooning was waiting for me to come along. I have plenty of partial ability.
— Berke Breathed

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker jokingly presents cartooning as the destination for someone unable to succeed fully at writing or fine art. Calling this 'partial ability' turns self-criticism into an explanation of suitability. The boast hides inside an account of apparently modest talents.
Context reviewed