The word integrity has two meanings. The first is "honesty"... We have to be honest in facing our limitations, in facing the sheer complexity of the world, honest in facing criticism even of things which are deeply precious to us. But integrity also means wholeness, oneness, the desire for single vision, the refusal to split our minds into separate compartments where incompatible ideas are not allowed to come into contact. An undivided mind looks in the end for an undivided truth, a oneness at the heart of things. The whole intellectual quest, despite its fragmentation, despite its limitations and uncertainties, seems to presuppose that in the end we are all encountering a single reality, and a single truth.