It is "make me one with everything."
This is a play on the ideas some Buddhists have about life being a journey whose end game is to become one with the Universe. They live lives, steadily progressing to that state, or at least aiming for it.
Not a great explanation of Buddhism, but it is something like that.
So, "make me one with everything," is like giving a Buddhist his fondest desire, and in fact, what he is striving toward, in this life, and all his next lives until he gets to become one with everything.