Yogic perfection, eight kinds of perfection,
- animā-laghimā-prāptiḥ
- prākāmyaṁ mahimā yathā
- īśitvaṁ ca vaśitvaṁ ca
- tathā kāmāvasāyitā
So they obtain eight kinds of siddhis. They are also called siddhas. From material point of view, a perfect yogi can counteract anything, and whatever he likes, he can do. That is called siddhi, aṣṭa-siddhi. But still, he is not as siddha as Kṛṣṇa. Kṛṣṇa's name is Yogeśvara. He is the master of all the yogis.