I have read many writings both of heathen philosophers and inspired prophets, ancient and modern, and have sought earnestly to discover what is the best and highest quality whereby man may approach most nearly to union with God, and whereby he may most resemble the ideal of himself which existed in God, before God created men.
And after having thoroughly searched these writings as far as my reason may penetrate, I find no higher quality than sanctification or separation from all creatures. Therefore said our Lord to Martha, “One thing is necessary,” as if to say, “whoso wishes to be untroubled and content, must have one thing, that is sanctification.”
Meister Eckhart – Sanctification
38 As Jesus and his disciples were on their way, he came to a village where a woman named Martha opened her home to him. 39 She had a sister called Mary, who sat at the Lord’s feet listening to what he said. 40 But Martha was distracted by all the preparations that had to be made. She came to him and asked, “Lord, don’t you care that my sister has left me to do the work by myself? Tell her to help me!” 41 “Martha, Martha,” the Lord answered, “you are worried and upset about many things, 42 but few things are needed—or indeed only one.