"Gotten on soapbox" is a phrase that describes someone who is speaking passionately about something, often in a public setting. The antonyms for this phrase would include "remaining quiet," "staying neutral," or "keeping opinions to oneself." Rather than taking a vocal stance, one could choose to listen to others or simply abstain from participating in the discussion altogether. However, it is important to note that remaining silent may not always be the best course of action. It is crucial for individuals to express their values and beliefs to effect positive change, but it should be done in a respectful and constructive manner.