Thought is not a gift to man but a laborious, precarious and volatile acquisition.
Biography - a system in which the contradictions of a human life are unified.
Man in a word has no nature; what he has... is history.
Man is a fugitive from nature.
One age cannot be completely understood if all the others are not understood. The song of history can only be sung as a whole.
We cannot put off living until we are ready. The most salient characteristic of life is its urgency, 'here and now' without any possible postponement. Life is fired at us point-blank.