A quote from the writings of Meister Eckhard, the the great genius of medieval mysticism. He emphasized the need to quieten and empty the mind of all concepts in order to deepen our understanding of what is essential. Though written from a Christian perspective in the 13th Century, these words could come from the current writings on mindfulness:

There exists only the present instant… a Now which always and without end is itself new.

There is no yesterday nor any tomorrow, but only Now, as it was a thousand years ago and as it will be a thousand years hence.

Meister Eckhard (1260 – 1328)