Presumably there is indeed no purpose in the ultimate fate of the cosmos, but do any of us really tie our life's hopes to the ultimate fate of the cosmos anyway? Of course we don't; not if we are sane. Our lives are ruled by all sorts of closer, warmer, human ambitions and perceptions.

Unweaving the Rainbow: Science, Delusion and the Appetite for Wonder (ed. Penguin UK, 2006) - ISBN: 9780141937038