You can talk about mastery when energy is under control. There are many forms of energies. A true master of yoga has all the energies of the chakras and the corresponding sentences in check. Master experiences the energy flow in physical, mental, astral and causal field. A true master is called a Yogi. You understand that there are only a few available on Earth.
One of the last words of Jesus: "Father, forgive them, for they know not what they do".
The consciousness of the great masters is so great that we as humans can not comprehend it. The words of the masters can practically not be understood and interpreted with the lower consciousness that is dominated by the ego.
Krishna is the great master of the East
Jesus is the great master of Christianity
Muhammad is the great master of Islam