I don't recommend sitting against a wall. If you plan on meditating, I recommend investing in a zafu and zabuton. They'll provide much better back support than a wall or just the floor.
Please explain: if it keeps you alert, you also have to concentrate your thoughts on this. Isn't this in contradiction to let all thoghts go?
Thanks for an answer...
You make me want to go into Zen teachings now. So I will summarize them as much as I can:
What I meant:
Thoughts: Things going on.
Alert: Being aware of something. Observing something (can be thoughts)
Not being alert: You will drift off to sleep.
Meditation: Focusing (as in deliberative) and/ or Observing something that doesn't go on into endless thinking tank.
Let go of thoughts: that become an essay. Start thinking about Python and you can write an essay right now. Start listening to your breathing. And release any other thought that comes in. Yes you can keep repeating word Python and try to release thoughts that follow but it's easier with things like sound and mantras.
Sure there is much more to it than what I've written but hope you get the idea.
