The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.

The interplay between light and matter at attosecond timescales reveals a universe far more dynamic than we ever imagined.

Science cannot solve the ultimate mystery of nature. And that is because, in the last analysis, we ourselves are part of nature and therefore part of the mystery that we are trying to solve.

The past is always with us, and it shapes who we are.