One of the casualties of this tendency we have to turn the Dharma into an “ism” (i.e., Buddhism), is that the arts and sciences that make up the Dharma often become homogenised into some sort of “religious doctrine”, stripping away all of the freedom and value the practice once had.
Mindfulness is the art and science of bringing our awareness to the moment. It is the practice of experiencing our True Nature, as Pure Awareness.
The Buddha Śakyamuni is said to have advocated the practice of mindfulness in one’s daily activities, as a means of grounding oneself in the calm awareness of the transitory and impermanent nature of all phenomena, one of the key facets of the path to awakening.
But you see, that’s just it… he didn’t say we need to “believe something about mindfulness”. He didn’t even find it necessary to define mindfulness. He simply said we should practice it.
And that’s where the religion of Buddhism fails in a postmodern world.