Meister Eckhart
Meister Eckhart's Sermons1298
God is in all things, he is more intimate to every creature than any of its own parts are, he is indistinguishable from all things. Likewise, man should not be anything in himself and quit himself, for that is how he is all things. It is then that he grasps “the deity of God”, which “resides in that he is indistinguishable from all things”
Reference
Meister Eckhart. Sermons. Sermon 77. First time translated into English by Claud Field, M.A. ca. 1909.
https://en.wikisource.org/wiki/Sermons_(Meister_Eckhart)