Just as the highest and the lowest notes are equally inaudible, so perhaps, is the greatest sense and the greatest nonsense equally unintelligible.
Allan Watts

Renunciation is not getting rid of the things of this world, but accepting that they pass away.
Aitken Roshi

The greatest achievement is selflessness.
The greatest worth is self-mastery.
The greatest quality is seeking to serve others.
The greatest precept is continual awareness.
The greatest medicine is the emptiness of everything.
The greatest action is not conforming with the worlds ways.
The greatest magic is transmuting the passions.
The greatest generosity is non-attachment.
The greatest goodness is a peaceful mind.
The greatest patience is humility.
The greatest effort is not concerned with results.
The greatest meditation is a mind that lets go.
The greatest wisdom is seeing through appearances.
Atisha

Mindfulness is the aware, balanced acceptance of the present experience.  It isn't more complicated than that. It is opening to or receiving the present moment, pleasant or unpleasant, just as it is, without either clinging to it or rejecting it.

Sylvia Boorstein