“Capable. ‘Men are capable of being flattered.’ Say susceptible to flattery. ‘Capable of being refuted.’ Vulnerable to refutation. Unlike capacity, capability is not passive, but active. We are capable of doing, not of having something done to us.”
Excerpted from: Bierce, Ambrose. Write it Right: A Little Blacklist of Literary Faults. Mineola, NY: Dover, 2010.