Over the months and the years, only its outer appearance will change. It will lose colour and its original shape, but not its quality! It will be even gentler on your skin.
Keep your Marseille soap away from sources of heat and damp.
You can let it dry in your wardrobes and cabinets, it will get rid of the moths and leave a delicate scent on your linen. You can also put it in your bed, under the bottom sheet to avoid cramp in the night.