(An old post from an old blog, recycled)
That all of your knowledge is like stones lying in a field. Where did they come from?
You didn't put them there. They erupted -- are continually erupting -- from the earth's bowels, from the soil itself, which is a fine matrix of crushed stones, old knowledge, edges worn away by endless exposure to the light of the sun, the pressures of water and wind, and the ceaseless, restless shifting of the earth itself.
Pick them up and build with them. Build a castle. Build walls, build mills and line wells, build your homes. Live in them, raise your children and animals in them. Line your gardens with them and shape your tools from them. They are endless and they are yours.
In time they will crumble back to the earth and with the help of the sun and moon, they will feed you. Know that they are the substance that protects you and sustains you. Know that they are the substance of which you are composed and to which you return.
Lay no store in knowledge. It is nothing. Like the stones, it is only earth and sun and moon. It is only the all of everything and only emptyness. You may value knowledge, but only for a moment. More than that disallows it, prevents it, subverts it into something other than its origins. Knowledge is only consciousness. It is the field itself in which you lay. Cultivate it, then forget about it.
As the poet says, "Work without doing."