Watched this scene from a Cantonese drama. From a season of "Healing Hands" if I'm not wrong. Like it a lot.
(in a hospital)
A patient was complaining about his pain on his leg on a wheelchair, pressing at the site of the pain. A doctor attended to the patient. The patient, unable to hold on, slided his hand to his empty trousers - we learnt that the patient had his leg amputated earlier and was experiencing phantom limb.
In the next scene, the doctor turned to his female colleague: "There are things that we only learn to appreciate only after it's gone....."