The phrase "ask oneself" is commonly used to refer to the act of reflecting or contemplating a particular thought or question. However, there are several other synonyms that can be used in place of this phrase, including "ponder," "meditate," "consider," "contemplate," "reflect," "muse," "ponder," "ruminate," and "introspect." Each of these synonyms has slightly different connotations, but all generally refer to a process of deep thought and introspection. Using a variety of synonyms can help to keep language fresh and interesting, while still conveying the same essential meaning.