Plants are mostly liquid, with a thin layer of solid outer layer. Following the Spiritual Structure, plants are mostly life force, with a little bit of consciousness. To grow into a full plant and produce seed, it needs light, which is spirit itself.
In this process, it uses gases: feelings. It changes the gas into solid matter. Plants, with the help of spirit, changes feelings into matter, into consciousness! Whereas humans and animals change matter into gasses again; consciousness into feelings.
More so, the plants in your surrounding (and those you eat) are heavily influencing your balance between life force and consciousness. When you are in a plant rich surrounding, your active consciousness is much calmer and the life force is much stronger, then when you’re in a build, solid rich surrounding.