"Am on warpath" is an idiomatic expression that describes a person's state of anger or aggression. The antonym for this phrase would be "at peace." When someone is at peace, they are calm, tranquil, and not easily provoked. They have a sense of serenity and contentment. Being at peace with oneself and the world around them promotes a positive mindset, which can lead to better health and a sense of well-being. Having a peaceful mindset allows individuals to handle difficult situations with clarity and composure. Therefore, taking a moment to breathe, relax, and find inner peace can be incredibly beneficial in maintaining balance and harmony in one's life.