Don’t think dreams are not real by applying your studies in Physics or Biology or Chemistry. It may be a fact that dreams don’t have weight, neither do they occupy space. They lack mass and for that matter have no density. It’s a fact that we can tell the phylum to which dreams can be classified. However, they are mental imaginations, motivated by drive to fulfill a purpose, the reasons why Science existed. Science also existed once as a dream and today it becomes a reality. What you imagine doing today will be real if only you appreciate the grace to work it out. Shalom!