The Buddha spoke about everything which is real. What he taught can be proved by our own experience. However, we do not really know the most common realities of daily life: the mental phenomena and physical phenomena which appear through eyes, ears, nose, tongue, bodysense and mind. It seems that we are mostly interested in the past or the future. However, we will find out what life really is if we know more about the realities of the present moment, and if we learn to be aware of them when they appear.