The phrase "art sure of" implies a level of confidence and certainty. However, antonyms for this phrase include words that express doubt and uncertainty. Some examples include "uncertain," "doubtful," "unsure," and "hesitant." These words convey a sense of hesitation or indecision, suggesting a lack of confidence or trust in one's abilities or judgment. Other antonyms include "insecure," "unpredictable," and "ambiguous," all of which suggest a lack of clarity or stability. While being "art sure of" may feel empowering, it is important to recognize and grapple with the moments of doubt and uncertainty that inevitably come with any artistic or creative endeavor.