From "Tolkien: A Cultural Phenomenon" (2003) by Brian Rosebury

This text is reproduced exclusively for the purposes of discussion on The One Ring.net.

[page 37] 

‘Let folly be our cloak, a veil before the eyes of the Enemy! For he is very wise, and weighs all things to a nicety in the scales of his malice.
But the only measure that he knows is desire, desire for power; and so he judges all hearts. Into his heart the thought will not enter that any
will refuse it, that having the Ring we may seek to destroy it. If we seek this, we shall put him out of reckoning.’ (FR, 283)