Thought. Movement. Time.
A thought is an upshot of the desire. A person thinks of what he wants, and does not think of what he does not want. For example, a person never thinks of his dying day. On the contrary, he will always contemplate his eternity since this is what he wants.
However, there is a special role to the thought: it intensifies the desire. If a person has a small desire that lacks strength to expand and reach the desired, but thinks and contemplates on a matter, he can make the desire grow, expand, and start to demand its fulfillment.
It turns out that the thought serves the desire, and the desire is the “self” of the person. A great desire dominates the small desires. And if a person wants to increase some small desire, the advice is to strengthen his persistent thought of the desire since the desire grows to the extent that one thinks of it.
And so, one should study Kabbalah constantly for the persistent effort in thought increases one’s spiritual desire until it becomes the actual ruler.
– Baal HaSulam, Shamati (I Heard), Article No. 153, “The Thought Is an Upshot of the Desire”