If a patient cannot clean his teeth, no dentist can clean them for him.

Using a homely dental example, Fischer underscores a broader principle of self-responsibility: some outcomes depend primarily on the individual’s sustained habits, not on intermittent expert intervention. A dentist can treat disease and give instruction, but daily maintenance—brushing, cleaning, prevention—cannot be outsourced. The saying generalizes to health, education, and character: teachers, doctors, and advisers can guide and assist, yet lasting improvement requires the person’s own repeated effort. The aphorism also critiques the temptation to seek a professional “fix” for problems rooted in routine behavior, emphasizing prevention and personal agency over episodic repair.