Instead of taking these characteristics and saying that they are the basis for “human dignity,” why don’t we simply accept our destiny as creatures who modify themselves?
He mentioned several times that human nature can be the basis for values and morality, but here he says that human nature is subject to change. In that case It sounds like he believes that the standards of morality and value which are based on human nature should also change and that doesn't sound like very firm ground to stand on.

