St Augustine, one of the greatest theological thinkers of history, once saw a boy running backwards and forwards from the sea shore to a lagoon with a bowl full of sea water that he would pour into the lagoon. Augustine asked him what he was doing and he said he was trying to empty the sea and fill the lagoon. Augustine realised that that was exactly what he, as a theologian was trying to do – to exhaust the knowledge of God and pour it into human understanding. And just as that boy could never do that with the sea, neither can we do it with God – God is too big.
But God has given us what we can understand:that Christ became what we are so that we could become what he is. Though we can never exhaust the depths of this, it still is the power of God for the salvation of everyone who believes.