The antonyms for the phrase "humbled oneself" would include prideful, arrogant, conceited, egoistic, vainglorious, and boastful. These words indicate a lack of humility and an excessive focus on one's own importance or achievements. Whereas humbling oneself requires a certain amount of self-awareness and willingness to learn from others, exhibiting these traits suggests a closed-mindedness and an unwillingness to admit flaws or mistakes. By contrast, embracing humility and a willingness to learn can often lead to growth, both personal and professional. So rather than being prideful or conceited, strive to remain humble and open-minded, and reap the benefits of these characteristics both in your personal and professional life.