Until you go into samadhi, you are constantly experiencing the residual conditioning of the past in the present. The weight of all the unresolved karma stored in your physical, subtle, and mental bodies creates a situation wherein your experience of the present is so heavily conditioned by the past that it becomes impossible for you to experience the present moment.
When the shaktipat impulse passes through the physical, subtle, and mental bodies, it breaks up and removes this karma, freeing you from the burden of karmic conditioning. As this process takes place, you may find all kinds of thoughts passing through your mind. The trick is to not grab onto these thoughts and engage them; just let them go by.