Pre-Desire: Desire to Desire
Ayin Beis Volume 1, Discourse 17, Atem Netzovim, Chapter 65 p. 121-123
Short Summary: The actual (revealed) desire is preceded and rooted in the power of desire (or concealed desire), thought, which is simply a heskem, a resolution and determination on the worthiness of the desire, but is not yet an actual stimulated desire, being drawn and longing to the object. It can even take time between these two stages. (This is lower than the firm essential desire (rotzon ha'muchlat b'etzem), which is simply within the essence, and may never be expressed).
The actual (revealed) desire is preceded and rooted in the power of desire (or concealed desire), which is simply a resolution and determination (heskem) on the worthiness of the desire, but is not yet an actual stimulated desire, that is longing for and palpably being drawn to the object.
This stage of desire, which emerges after some awakening of desire, is a step lower than the firm essential desire (rotzon ha'muchlat b'etzem), which is simply within the essence beyond any form of arousal, and may never be stimulated and expressed. By contrast, the desire we are discussing comes after his interest has been aroused and he had an internal dialogue whether this object is worthy to be desired or not, and he has determined that it is worthy. Yet, the desire is still only a determination, not an actual yearning. It's possible that years may elapse until he will actually desire and pursue the object.
This determination is called "thought," not actual desire - rotzon -- which consists of the same letters as "tzinor", a channel that draws down the soul to a particular object, being that he is excited and immersed in the desire.
Concepts: Determination to Desire
Transcendence (chapters 49-83)