A Voice from the Past - John of Damascus

And the Son alone is generate, for He was begotten of the Father's essence without beginning and without time. And only the Holy Spirit proceedeth from the Father's essence, not having been generated but simply proceeding. For this is the doctrine of Holy Scripture. But the nature of the generation and the  procession is quite beyond comprehension.

John of Damascus, 676-754 AD, Exposition of the Orthodox Faith, Book I, Chapter VIII, (translated by Rev. S. D. F. Salmond, The Nicene and Post-Nicene Fathers, Philip Schaff and Henry Wace, T & T Clark and Wm. B. Eerdmans Publishing, 1997, Second Series, Vol. IX, p. 8)

Is this the right way to approach this type of issue? At what point do we need to realize we cannot fully understand God's nature?