Spiritual development is getting outside yourself, beyond yourself, and becoming part of something bigger and more than yourself.
You objectively recognize who you are and what you do, then you discover what is truly meaningful to you and genuinely live it without limitation. Lastly, transcending individuality, existence now becomes unity with all forms, and your being is the pure consciousness that gives rise to them.
Your identity shifts from ego to existential self to spiritual self, and then to Absolute Source.