Advaita is Sanskrit for “non-dual.” A + dvaita is a + dual.
Christianity is non-dual. This is not to say that it agrees with Shankara’s monism; indeed, it is not to say that Christianity is monist at all. Christianity is not monist; it is pluralist.
It is non-dual in that, as it insists, there is no being whatsoever that is not sourced and ended in God. God is the being of all beings.
It might help for me to flesh this out by means of some metaphors – some exactly true metaphors, some perfect metaphors.
Just as there really are finite numbers, so really are there creatures. There are other things than God, that are definite, and that are definitely not God.
And just as the difference between five and Infinity is infinite, so the difference between finite creature and Infinite Creator is infinite.
But there is no finity apart from the Infinite; no solute apart from the Absolute; no power apart from Omnipotence; no time apart from Eternity; no creature apart from the Creator.
Five is implicit in Infinity, and vice versa; so that five and Infinity come along together, as a package deal. Likewise this instant is implicit in Eternity, and vice versa. So then also likewise is the Creator implicit in the creature, and vice versa.
Yet there is no question as to the logical and ontological priority and superiority in these pairs: Eternity is prior and superior to yesterday morning, and its forecondition; likewise is Infinity to five, and Creator to creature.
Five is not Infinity; they are quite different sorts of things – inasmuch, e.g., as infinity is not a number at all, but a quantity. But five has its being in Infinity, and there is no part or aspect of five that has its being in any other way.
As every finite number implies the Infinite, so is it a sign thereof. Creatures then likewise are signs of their Creator. The signs and meta-signs are all there, right in front of us. Indeed, we are made of them. There is nothing else, but them. Everything is made of signs of God. It’s just that they look to us like ordinary dumb stuff. But in fact, they are all singing, all the time, as they shine.
God is ubiquitous, the Source and End of all things. So everything is a sign of his presence, even Lucifer. How, pray, could it possibly be otherwise, for Omnipotence? But we mistake the meanings of his signs to us, and so usually miss them altogether, because we construe them under the signs of our own devices and desires. We are idolaters. We err, and stray.
He has us already on his shoulders, the whole time.
So, just wait. The sign and the meta-sign have already been given to us, as the very matrix of our life.
Wait, knock, ask. Which is to say, repent, do penance, and pray. Soon enough, you will see that you had already arrived at your true Home, long since, and it will then be opened to you, and you will be answered.