Perhaps ultimately, spiritual simply means experiencing wholeness and interconnectedness directly, a seeing that individuality and the totality are interwoven, that nothing is separate or extraneous. If you see in this way, then everything becomes spiritual in its deepest sense. Doing science is spiritual. So is washing the dishes.
Jon Kabat-ZinnTo drop into being means to recognize your interconnectedness with all life, and with being itself. Your very nature is being part of larger and larger spheres of wholeness.
Jon Kabat-ZinnTo let go means to give up coercing, resisting, or struggling, in exchange for something more powerful and wholesome which comes out of allowing things to be as they are without getting caught up in your attraction to or rejection of them, in the intrinsic stickiness of wanting, of liking and disliking.
Jon Kabat-Zinn