“In formulating any philosophy the first consideration must always be: What can we know? That is, what can we be sure we know, or sure that we know we knew it, if indeed it is at all knowable. Or have we simply forgotten it and are too embarrassed to say anything? Descartes hinted at the problem when he wrote, 'My mind can never know my body, although it has become quite friendly with my legs.”

“consider the implications. We think we know what we want, but we can never really know until we've got it. And sometimes when we have, we discover we never really wanted it in the first place - but then it's too late”

“If we don't dream. Then we will never know what we can become.”

“I can see it, hear it, feel it, taste it - but I can never be on the inside of it with you. I cannot even be sure whether I really know what it is like. Is it 'like' my own? Or incomparable? Just as I can never know if what you see at any given moment is exactly the same as what I see. We look at a colour. We both call it red. But it is only because we have been taught to call it by that name. There is no guarantee - not ever - that we see it in the same way, that your red is my red.”

“Science tells us what we can know, but what we can know is little, and if we forget how much we cannot know we become insensitive to many things of very great importance.”

“Our ignorance can be divided into problems and mysteries. When we face a problem, we may not know its solution, but we have insight, increasing knowledge, and an inkling of what we are looking for. When we face a mystery, however, we can only stare in wonder and bewilderment, not knowing what an explanation would even look like.”