keep your nose to the grindstone

The phrase "keep your nose to the grindstone" means to work diligently and intensively, often implying perseverance and focus on a task or objective. It suggests maintaining a strong work ethic and staying dedicated to achieving one's goals, even when faced with challenging or tedious circumstances. The phrase originates from the practice of sharpening tools or blades using a grindstone by pressing one's nose against it to maintain concentration and avoid distractions.