The phrase "stops one's tracks" refers to something that halts a person's progress or train of thought, causing them to pause or become suddenly still. The antonyms for this phrase would be anything that encourages movement or progress. Words like "encourages," "stimulates," "motivates," and "propels" all convey a sense of forward momentum and activity. Similarly, phrases like "pushes forward," "moves ahead," and "drives on" all express the idea that something is actively propelling us towards our goals. By contrast, words like "discourages," "distracts," or "detains" all suggest things that hinder or impede progress, bringing our forward motion to a sudden halt.