What are your strengths?

Peter Drucker, famed management guru said: ‘Build on your strengths’…
“A person can perform only from strength. One cannot build performance on weaknesses, let alone on something one cannot do at all.”
It seems that even one strength built on and used makes the person’s fatal flaws insignificant… Boggles the mind that so few actually do build on their strengths, because all the self-help books…