The antonyms for "becoming insane" would be "sanity," "clarity of mind," and "soundness of mind." These words represent the opposite of insanity, which is a state of being mentally ill or unstable. Sanity refers to a healthy and stable mental state, free from any form of mental illness or abnormal behavior. Clarity of mind emphasizes a clear and organized thinking process, while soundness of mind implies a complete absence of any form of mental disorder or illness. Using these words in opposition to becoming insane can help convey a sense of mental well-being, balance, and stability.