Is it normal to look at things differently?

Sometimes, i feel kinda depressed, i don't want to do anything and i feel like my life is worthless.
Whenever that happens, i just go outside, i sit on a bench or i walk for a bit and it really helps.

Sometimes i can look at a rock, and i will think something like:
"What does it matter, that rock is there. Its hard. My skin is so fragile, i can be torn open so easily. When we humans are long gone, that stone might still be there, so chin up!"

The skin-thingy is something i have wondered for some time. Only us humans are so fragile. I hate blood and i've never tought of hurting myself, so its nothing like that.
It feels weird to gain strength from the fact that a rock is hard and will 'live on' for a long time.
Doesn't have to be a rock, it could be a leaf, or a bird. Does anybody else ever feel like this? I don't know if its random or common.

When it rains, i want to go outside very much. To me, it feels as if the rain connects me to the hard rock, the wet rocks that our skin is still so painfully fragile to.

Please comment, i have no idea if this is normal