In yoga philosophy, the buddhi is impaired in its function by the presence of what are called samskaras, or the subliminal impressions of past experiences. In common Sanskrit usage, a samskara is literally an impression, like a footprint in the sand at the beach. Now, if there is a series of deep footprints and other impressions in the sand, when the tide comes in and the water flows over them, it will flow differently than if the sand were perfectly smooth. In precisely the same way, when the energy of reality flows through your mind, it is affected by the deep impressions of the past experiences that are lodged there, and thereby it flows differently. Thus based on our experience of the past, we formulate projections and make assumptions that too often are misaligned with the reality of the present. Our brains are good at pattern matching—perhaps too good, for even a superficial resemblance of the current situation to a past situation will cause us to unconsciously assume that the present is like the past in most or all of its details. This act of unconsciously projecting the past onto the present is the primary reason we are unable to be aware of the reality of the current situation as it is, and thereby, make good choices.
— Christopher D. Wallis, Tantra Ulluminated