Is your understanding of God and Christ and Theology the same as it was when you were first "Saved" or "born again" or whatever?
I hope not. Your understanding of the same truths, which were always true, has grown and developed. To a new Christian today you could explain the truth a whole lot better than you could have way back when. You yourself have grown in understanding and in being able to communicate this understanding. Now did the Truth change along with you all of these years since you got saved?
Of course not. Now if we consider the Church to be an organism its collective understanding of Truth has been growing for two millennia. What we all understand now about God is based upon generations before us learning and adding to this store of understanding.
SD
This is the RC version of the liberal's line that the Constitution is a "living, breathing document". Thus allowing them to make up, out of thin air, anything that they so desire, as long as the magisterium, er... high court agrees to it. A very edifying post SD.