Good meditation teaches you how to drop your thought. The moment you drop your thought, desire vanishes in thin air like a dewdrop upon sunrise. With practice you learn to take your mind off each time a desire arises, especially undesirable ones, the ones that become temptations have the potential to completely throw you off the course. As you progress, you actually start to see your desires as mere thoughts with no intrinsic value. To detect emergence of thoughts requires an ever present and alert mind quite like the security system at the airport that beeps even if you walk through it with a penny in your pocket.
You don’t have to be alarmed when desires come knocking, they are only natural. They are attractive fruits on the mind tree, sumptuous, luscious, shiny fruits waiting to be plucked. How many can you clip or pluck after all or can you? One day you’ll need to get to the root. And the root of the desire tree is aptly called mind. Expectations are the illegitimate children with desires as their step siblings of an ignorant mind and conditioned self. If you get married to a desire, be ready to pay child support for a very long time to come. They keep us entangled. They keep us engaged in meaningless pursuits for a long time, till one day it’s too late to change the course of our lives.
Not every lingering thought becomes desire though. Some become expectations and some take the form of an emotion.
Reference : Om Swami. A Million Thoughts.