The teachings tell us that buddha is here, right now. It is said the moment you think of them, the buddhas are here. I often reflect on this and try to get my head around this statement because I find it difficult to grasp. How can it be that the buddhas are here the moment I think of them? One way my teacher has sometimes explained this is to think of Buddha as the ultimate truth. Since buddha nature is the nature of everything, it is present everywhere. The other way to think of buddhas is to think of actual beings. I have heard that the Dalai Lama once answered a question about this by explaining that just as there are beings like me there are enlightened realized spiritual beings. They are the natural manifestation of this truth.
One of my teachers, Nyoshul Khen Rinpoche, used to compare our buddha nature to a mother and us to a crying child that has lost its mother and feels alone and in need of comfort. The mother is holding the child and trying to comfort him, but it is a tragic situation because the child cannot see and feel the mother and thinks the mother is not there. Therefore, it keeps crying even though its mother is right there.
To get used to this idea, I sometimes try to imagine that buddhas are present in the room even if I can’t see them.