But the Soul of Nature is quite impersonal and therefore the moral quality of this action depends entirely on the human operator.

This is the point of the Master's teaching regarding the destruction of the fig tree, and it is on this account He adds the warning as to the necessity for clearing our heart of any injurious feeling against others whenever we attempt to make use of this power (Mark xi: 20-26).
According to His teaching, then, this power of controlling the Soul of Nature by the addition of our own Personal Factor, however little we may be able to recognize it as yet, actually exists; its employment depends on our perception of the inner principles common to both, and it is for this reason the ancient wisdom was summed up in the aphorism "Know thyself." No doubt it is a wonderful Knowledge, but on analysis it will be found to be perfectly natural.

It is the Knowledge of the cryptic forces of Nature.

Now it is remarkable that this ancient maxim inscribed over the portals of the Temple of Delphi is not to be found in the Bible.

The Bible maxim is not "Know thyself" but "Know the Lord." The great subject of Knowledge is not ourself but "the Lord"; and herein is the great difference between the two teachings.