Knowledge of unity alone dispels ignorance.
Knowledge only removes the false notion it does not create anything.
Scriptural statement cannot impart any power to a thing. For it is an accepted principle that the scriptures are only informative, not creative.
Everything is the effect of righteousness and unrighteousness : whatever is differentiated is the result of these two. The self, on attaining it, becomes identified with that.
It is true that good and bad deeds prompted by desire etc. are the cause of a man's taking a body; still it is under the influence of desire that he accumulates these deeds. When desire is gone, work, although present, does not lead to the accumulation of merit or demerit. Even if he goes on doing good and bad deeds, these, bereft of the desire, produce no results; therefore desire is the root of transmigratory existence.
Source – The Brihadaranyaka Upanishad with the commentary of Adi Shankaracharya Translated by Swami Madhavananda