Wanting in ability or qualification for the purpose or end in view; not large enough to contain or hold; deficient in physical strength, mental or moral power, etc.; not capable; as, incapable of holding a certain quantity of liquid; incapable of endurance, of comprehension, of perseverance, of reform, etc.
Not capable of being brought to do or perform, because morally strong or well disposed; -- used with reference to some evil; as, incapable of wrong, dishonesty, or falsehood.
Not in a state to receive; not receptive; not susceptible; not able to admit; as, incapable of pain, or pleasure; incapable of stain or injury.
Unqualified or disqualified, in a legal sense; as, a man under thirty-five years of age is incapable of holding the office of president of the United States; a person convicted on impeachment is thereby made incapable of holding an office of profit or honor under the government.
As a term of disgrace, sometimes annexed to a sentence when an officer has been cashiered and rendered incapable of serving his country.
One who is morally or mentally weak or inefficient; an imbecile; a simpleton.
Selfish persons are incapable of loving others, but they are not capable of loving themselves either. Erich Fromm
A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity. Robert A. Heinlein
As you get older and wiser you realize that when people are given anything without having to earn it (unless they are physically or mentally utterly incapable of earning anything), they become ungrateful and lazy. They also become less happy. Dennis Prager
Few people are capable of expressing with equanimity opinions which differ from the prejudices of their social environment. Most people are even incapable of forming such opinions. Albert Einstein
If history repeats itself, and the unexpected always happens, how incapable must Man be of learning from experience. George Bernard Shaw