Why is pride considered such a bad character trait in the ancient world?

Pride is an emotional state deriving positive affect from the perceived value of a person or thing with which the subject has an intimate connection. It may be inwardly or outwardly directed. With a negative connotation pride refers to a foolishly[1] and irrationally corrupt sense of one's personal value, status or accomplishments,[2] used synonymously with hubris. With a positive connotation, pride refers to a content sense of attachment toward one's own or another's choices and actions, or toward a whole group of people, and is a product of praise, independent self-reflection, and a fulfilled feeling of belonging.