“Being sad vs being blue is not good for the sole” can be interpreted both metaphorically and literally, depending on how you look at it:
1. Metaphorically:
Sadness often weighs you down emotionally, and that emotional heaviness can translate into physical posture—slumped shoulders, dragging feet, lack of energy. This “weight” can feel like it settles in your soles, making it hard to move forward, both physically and in life.
2. Literally (playfully):
If you’re sad, you might walk less, stay inside, or carry yourself differently—all of which can affect the soles of your feet. Depression can lead to inactivity, and inactivity is bad for the body, including your feet.
~ Joe Gradia