But the craft of the hand is richer than we commonly imagine. The hand does not only grasp and catch, or push and pull. The hand reaches and extends, receives, and welcomes – and not just things: the hand extends itself, and receives its own welcome in the hands of others. The hand holds. The hand carries. The hand designs and signs, presumably because man is a sign. Two hands are folded into one, a gesture meant to carry man into the great oneness. The
hand is all thing, and this is the handicraft. Everything is rooted here that is commonly known as handicraft, and commonly we go no further. But the hand's gestures run everywhere through language, in their most perfect purity precisely when man speaks by being silent. And only when man speaks, does he think – not the other way around, as metaphysics still believes. Every motion of the hand in every one of its works carries itself through the element of thinking, every hearing of the hand bears itself in that element. All the work of the hand is rooted in thinking. Therefore, thinking itself is man's simplest, and for that reason hardest, handiwork, if it would be accomplished at its proper time.
– Martin Heidegger (1968)
To Be and to Have (2002)