Bethink oneself is a phrase that means to think carefully or to reflect. There are several synonyms for this expression which can be used in different contexts. Considered to be another term for this phrase is "mull over," "ponder," "deliberate," and "meditate upon." When you are making complex and potentially life-changing decisions like applying for a job, buying a home, or marrying someone, you need to bethink yourself. You could also use "reconsider" or "re-evaluate" to describe this process. This phrase and its synonyms can be valuable to have in one's vocabulary during those moments when a person needs to reflect or make important judgments.