Heresy, Error, or Truth? Irving’s Humanity of Christ

The point at issue is simply this: whether Christ’s flesh had the grace of sinlessness and incorruption from its proper nature, or from the indwelling of the Holy Ghost. I say the latter. I assert, that in its proper nature it was as the flesh of His Mother, but, by virtue of the Holy Ghost’s quickening and inhabiting of it, it was preserved sinless and incorruptible.

The above quote is by Edward Irving concerning the humanity of Christ.  Your task is twofold.  First answer whether this is heresy, error, or truth.  Secondly, if you believe it is heresy or error tell me why.  If you believe it truth, tell me why.
For clarity sake allow me to explain what Irving is saying in a very simple question.  Is Christ born with a sinless nature or is he sinless because of the power of the Holy Spirit?  Irving believed that Christ was born with the same corruptible flesh as His Mother but was sinless because of the work of the Holy Spirit. 
Every Tuesday for awhile we are going to be doing this exercise.  Sometimes I will attempt a response…other times I may not.  None of these are meant to “trap” or to expose you as a heretic.  These are simply to exercise discernment and deepen our theology.  In all things my aim will be to magnify (as you do with a telescope not a magnifying glass) the greatness of the gospel.