Sankalpa is not a deviation. It is not considered as a deviation. When a seeker (sadhak) transcends from the small mind to the Big Mind, then he considers sankalpa as a hindrance. But from the point of view of the Big Mind, it is a step to go further. So if you think why did sankalpa arise in the Paramatma, He should remain unwavering (nirvikalpa) – this is not so. Sankalpa is also Paramatma, nirvikalpa is also Him and vikalpa is also Him. Like in an ocean, waves arise on their own, in Paramatma, a thought arose to become many, so He became many. Different types of nature, different types of people and different types of intelligence were created.
Day before yesterday, I was watching a National Geographic documentary on the creation of Earth. It said that about 400 billion years ago, there was only gas. Gas started spinning and fire erupted. Then from fire, water arose and then the Earth was formed.
I suddenly realized, ‘Oh this has been said in the Vedas! What new have they said?
In our Vedic knowledge, it is said in the form of shloka - In the space, first there was air, from the air fire arose, from fire water, and from water earth was created. The idea behind giving water to fire is that we go back to ourselves. From water to fire, fire to air and then, we do pranayama after giving arghya to the sun - we go to the air element. From the air we go to the space and then sit in meditation.
All these are different types of stories; examining them more deeply reveals something new.