When teaching meditation, the right metaphors make all the difference between great instruction and a lack of clarity. I often compare meditation to exercise when teaching. Physical exercise is commonly understood, while many struggle to grasp the technique of strengthening the mind.
This point of reference supports learning. We know exercise is beneficial for our physical health, just as meditation is beneficial for mental health. Developing your practice is like training your mind at the gym, building strength, improving form, developing muscle memory to alter the structure of the brain.
But there is a significant difference between physical exercise meditation. When allowing this metaphor to dictate your approach to meditation practice, it could do more harm than good.