Spirituality is simple but deep. This is a paradox.
It's not just an issue of "how to dos" when you are in this topic. There is no single prescription for everyone as we are all different. Marie Callas says it is up to us to be responsible for our own spiritual development.
It's just like swimming. I sure swimming is simple to learn. Normally you start at the shallow end and paddle your legs until you know how to float. Next you grow more ambitious and want to venture to the deeper end. You may gulp a few mouthful of water as you do so, but with the help of a float, you manage to conquer this end of the pool where your legs can't touch the bottom.
Next you may try to challenge yourself by doing lapses to test your endurance, or pick up more difficult strokes. You may jump into the sea too so as to feel the waves and the wild nature. There is always something better in front of you no matter at what stage you are. If you are expert swimmer, you know fish is beating you flat out.
Sometimes as we swim through our spiritual pools, it is just like real swimming. It can't be learned from a book or website or even through a teacher - though all those tools can only guide you at right direction. But you aren't swimming until you do it. And the more you do it, the more you develop your "spiritual" lungs and muscles to go deeper and longer.
Thank you. I think it is an amazing account.