The antonyms for the phrase "drove insane" can be classified into three broad categories - calmness, stability, and sanity. Words such as composed, serene, unperturbed, and collected can be used to describe calmness. On the other hand, stable, reliable, and predictable are the last thing the phrase "drove insane" can be associated with. Hence, antonyms such as steadfast, steady, and firm can be used to describe stability. Words like reasoned, sound, logical, and rational can be used to describe sanity. In sum, the antonyms for "drove insane" range from calmness to stability and end with sanity.