To realize that you are not your thoughts is when you begin to awaken spiritually. – Eckhart Tolle
This is a really important question. One important distinction to be made is the difference between the religious and the spiritual experience.
You can be religious and not spiritual which is most of what passes for the religious experience of the world. You can be spiritual and not religious.
Let me give you my view of where spirituality begins.
In the view of this writer spirituality begins where you as the personal sense of the separate self start to end. You as the idea of the separate self and spirituality are incompatible.
This is why the Master Jesus says:-
No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.- Matthew 6:24
The above quote is from the King James version of the Bible. Modern Bible translations change the word ‘mammon’ to the word ‘money.’
This gives the word ‘mammon’ a very limited view. It is better considered as “personal desire” rather than “money.”
Spirituality begins when your life focus moves from the never ending pursuit of personal desire (self) to alignment with what I call Divine Intention. (SELF).
This is where you begin to move from a focus on the personal will to power to the Will to Love. Your life purpose, in the words of the spiritual teacher Guy Finley becomes to serve Love’s purpose.
I think you can attend at Yoga classes whatever their style and practice spiritual yoga. You simply make the intention of your practice your willingness to be a servant of Love’s forever becoming.
This doesn’t have to be explicitly stated and it is better if it is not. It is your secret. It becomes your way of entry into the experience of true prayer.
But thou, when thou prayest, enter into thy closet, and when thou hast shut thy door, pray to thy Father which is in secret; and thy Father which seeth in secret shall reward thee openly. – Matthew 6:6
Praying in secret is the practice of being available to the flow of Divine Intention. It isn’t where you spend time petitioning or telling the Divine what you think you need.
Such prayers aren’t answered because they come from the false idea that the Divine is withholding something from you and that you and the Divine are separate.