Siva is considered to be the Adhi Yogi, First Yogi. He gave the world Vaasi Yoga. Vaasi Yoga is different from The Asthtanga Yoga of Patanjali in that while Vaasi Yoga directly reaches out to Consciousness, Asthtanga Yoga reaches out to Consciousness through the Modifications of Chitta. That is the cessation of thought processes.
When we perceive,we have the objects we Perceive and our Impressions of them in the Mind.
The Objects do not change from time to time.
It is our interpretation of them at a particular point of time changes.
So what needs to be changed is our perception of Objects.