The Buddha once said this to the Bhikkhus:
"Bhikkhus, as to the source through which perceptions and notions tinged by mental proliferation beset a man: if nothing is found there to delight in, welcome and hold to,
Thought has moved full circle, Senses have absorbed in the heart. Empty of a separate self, There is not "I" but only truth.
Before this there was one heart, But a thousand thoughts. Now all is reduced to, There is no love but Love.
Something in common, Flows deep in our bloodstream. Yet to name the feeling is to lose the feeling, So we leave it as it is and surrender to the mystery.
It's rising brings no dawn it's setting brings no darkness, It goes on and on unnameable returning into nothingness. Approach it and there is no beginning follow it and there is no end, You cannot know it but you can be it at ease in your own life.