For me spiritual development is the path I'm on every day. It's a constant transformation that comes by with facing my subconscious. It is made up of confronting my fears, anxieties, confronting the deepest part of myself.
I do this with the help of psychedelics, meditation, reading. Even the passing of my best friend helped me with this, of which I am grateful for every day. It might sound strange but that's how I feel about it.
Where it will lead me, I have no idea, but I have the feeling I am starting to like myself more. Just like you I try to accept the good and the bad, the tears and the laughter. I do believe that spiritual development happens on multiple levels.
I am curious to know which teachings you talk about?
"It permits you to see, more clearly than our perishing mortal eye can see, vistas beyond the horizons of this life, to travel backwards and forwards in time, to enter other planes of existence, even (as the Indians say) to know God." R. Gordon Wasson