Siddha Teaching is always about the Conscious Awakening, Inner refinement, and transformation. It is the path of bio-spiritual Immortality no matter how people call it wether Shaivism, Sufism, Taoism, Siddha Tantra, Yoga, Kundalini Yoga ( Tantra) or other names. The true path is one and never contradicts the actual experience of one's natural being, the Ultimate Reality, and the science of Consciousness beyond any individual perception. True spirituality is very simple.
Awakening means you awake to your natural being or natural mind (words can be misleading) or the Ultimate Reality. In other words, you perceive yourself as a blissful being and reconnect with your blissful body. Through this reconnection, you start inner refinement, which leads to the cultivation of the inner stillness and transformation through deep equanimous absorption. Through this refinement and deeper integration of the body with the subtle self (energy body) and the blissful Being, one goes onto a different level of evolution and eventually learns through the experience how to really exit this current realm consciously and at will (realises the way to liberation from the gross-emotional reality). This is the path and the science of Siddhas ( or perfected evolved beings, regardless of the names of traditions or backgrounds they may come from).
True spirituality is never about energy feeling or pursuits of any feelings, exercises or concepts. It is about the experience of the natural blissful Being, reconnecting with this Being and self-refinement that culminates in simplicity, selflessness, and self-mastery. This self-mastery leads to the perfection of the body and one's ability to liberate self from the illusionary existence at the end of one's physical life. Most of the people do not know what life or death is. The exit from the physical body does not mean real death. Through inner transformation, one learns life within and learns how to exit this illusionary reality and further continues evolution as an evolved spiritual being. Wasting time on pursuing concepts, powers and techniques does not lead one to any evolution nor realisation nor liberation. One gets simply tangled in the experience. Learn to dwell in stillness and simple blissful equanimity of self and you will know everything without the desire to know. Very few are truly fortunate to come across this science through their own experience, and even fewer are fortunate to realise the power and the simplicity of the path through their inner maturity and selflessness and truly evolve through this science ... Fools keep on pursuing their spiritual ambitions, imaginary powers, and other new age nonsense, to never realise the root of the Being. They fall for the false techniques, sport-like yoga, mystical talks, and special attire and remain in the darkness of their self-imposed ignorance and spiritual ambitions. Such is the essence of the Siddha Teaching.