Smell the Air

I came home from the gym and when I entered my room, I inhaled fresh air from an opened window. I always open my window to let the essence of life in, to nourish and envigorate me. But when I'm in the room, I don't sense it much. It takes me leaving the house and coming back after a while to feel the freshness that uplifts me. I haven't thought much about the air. It's invisible and it doesn't smell anything unless it's mixed with something.
The air in my room was mixed with the smell of trees, grass, and something else. It made my evening. It was beautiful and yet so simple. Once again, I concur that the pleasant things are usually very simple. Just notice.