Sketch #1
This sketch represents a drawing of how would a person feel melancholy, because when we are feeling melancholic, we ended seeing ourselves in the mirror and couldn't tell ourselves why we are sad.
Which is why this sketch tells a person's visual representation of how we would look like if we're seeing ourselves through a mirror.
Sketch #2
This sketch is similar to Sketch 1&2, but this sketch has its own representation in telling and showing us on how we would look like at the 'outside' and the 'inside' of ourselves.
It tells us that in the outside, we may look sad, but the deep down inside of us tells us that we do not know how to feel anymore.
Sketch #3
This last sketch shows of a person's 'two faces', and how they would show their 2 sides on how they are feeling.
The right side shows a person's face when they are happy, and the left side tells that this person is actually sad for no actual reason, or don't know how to feel the emotions of him/her.