When I read the quote by Albert Einstein, “Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person,” the following Bible verse came to my mind:

“And thou shalt love

the Lord thy God

with all thy heart, and

with all thy soul, and

with all thy mind and

with all thy strength:

this is the first commandment.” – Mark 12:30 (King James Version)