The Anushasana, commonly called the Yoga Sutras of Patanjali, is separated into four padas, or parts. In short, the four parts reveal the path to Buddhahood, and yes, a Buddha is the highest state a human can attain. The word Yoga in Sanskrit means a remedy, a cure, a method, an opportunity, uniting, joining, fitting together, and so on, but in short it means becoming whole and healthy.
The four steps reveal the path to ultimate happiness, the way to generate the very mantras of the Yoga Sutras with a breath within the belly, raise a beam of light, and water to serve with Sacred AH to anyone. This is how one will know the enlightened. They will generate a light that spreads out from the body, not just a glow about the head as depicted in religious pictures. Since light is hot, water rises to cool the body and gift to others with Sacred AH. This would certainly have been an amazing thing to see in ancient times, and it will again when a hero reaches the top to the mountain. That is the grounds for enlightenment and the mission is compassion for all creatures that grasp for the breath and cry. A Buddha will live as an example of the teaching, but the Holy Spirit will rise from the womb with light and speak the Holy Message to the people of the earth. No doubt, it will be a life-changing event, but that is the purpose.