The phrase "stultified oneself" implies a state of being inhibited, hindered, or paralyzed in one's actions, thoughts or emotions. Antonyms for this phrase would be words that describe actions that are energizing, empowering, and inspiring. The opposite of stultified oneself could be expressed by words such as "liberate," "empower," or "rejuvenate." These words suggest a sense of freedom, vitality, and empowerment. One might use these words to describe a moment in which one feels reinvigorated, revitalized, and renewed, as opposed to feeling helpless, constrained, or paralyzed. By seeking the opposite of stultified oneself, we can find ways to break free from limitations and open oneself up to new possibilities.