We feel ourselves to be solid, yet we are nervous about our existence. We feel our world to be coherent at one moment; and at another, the whole fabric of our life-event can seem a trifle questionable. If we never experience our intrinsic spaciousness – we can only ever experience this alternation as: pain, discomfort, alienation; boredom, panic or dissatisfaction. But as soon as we begin to practise silent sitting meditation; to stare into the nature of what we are; we become a little suspicious of our life-event. We become intrigued by the transparent ambivalences of our situation. It could be quite possible that things are both not what they seem; and, simultaneously, exactly what they seem. This could be called the Tantric joke, the vajra sense of humour that continually prompts us to ask the questions: What is going on? Why is this solidity so solid and also so insubstantial? Why am I consumed by so much certainty and uncertainty?p47, Wearing the Body of Visions, Ngakpa Chögyam, Aro Books, 1995, ISBN 1-898185-03-4