A simple example to illustrate: we are introduced to someone at an event or on the job and we shake hands with them. As we shake hands, let us say we look into their eyes, perhaps in an attempt to learn more about them or simply because it it required thing to do in our culture. As we maintain eye contact with this human, we have a deja vu type of experience in which we receive impressions on the mind.
In this split second of perception, images, sounds, feelings arise. We are busy shaking hands and do not have time to pursue these sensations. Yet we do note a connection of some sort with this human. We note to ourself the feeling-tone generated within this meeting. Most humans have had these experiences I am sure, not merely the seekers of wisdom we address in our blogs.