Yes, I feel that way too in the forest. Woods and forests are a bit different for me... how I feel there.
It is a miracle how the trees change their dressings in the autumn. I sense the power of the creator then.
I believe all things have a spirit. It's something from my Cherokee being I'm sure, but it isn't contrary to my Christian beliefs either. I believe man is a greater spirit, capable of doing more with that Spirit within (whereas a flower can't get up and say it's going to visit a neighbor

)
In fortifying yourself, do you have to be in nature, specifically, or can you draw from nature through your remembrances of being there? Maybe it gives you energy to move through a task, or motivation to return soon.