Preaching appears to be a regular feature in modern forms of religion and spirituality. Religion and Spirituality can prosper through teachings and hand-holding, when there are seekers and interested people who want to know Reality. But preaching is the negative aspect of Guidance where flare is used as a selling and influencing mechanism to attract larger crowds using religion as a pretense. Preaching has less to do with spirituality and more to do with pomp and gimmickry.
It is important to understand the various limbs of Yoga. Unless one understands these limbs of spiritual practice, one shall not be sure or ascertained about the proper spiritual discipline that one should take up. Understanding the nature of mind and its relation to the spirit as well as the world is important. Understanding Jnana and Bhakti in that context becomes vital.
Kundalini Yoga is an ancient science. It is the science of energy patterns of the human system. The ancient seers have enunciated the various energy centres if the body and listed down a set of practices, to awaken the otherwise dorman power of the Kundalini. Understanding the possibilities of the Kundalini is an important step towards the unraveling of spiritual power dormant in the human system.
The story of sages cannot be complete without the story of Lord Shiva, the original sage, the master of all sages. He is the epitome of the ideal Guru. If a guru has to cultivate himself, as a giver of knowledge, then he needs to be the humble follower of Lord Shiva. Lord Shiva sets the example , a prelude to the way gurus should set precedent.