'Das Kapital,' I think, is very difficult to read, and for me, it was not very influential.
Thomas PikettyTo be safe at the expense of the liberty of other people is a difficult equation.
Madeleine AlbrightThe distance doesn't matter; it is only the first step that is difficult.
Mari de Vichy-Chamrond Marquise du DeffandIf you're a man and you ask questions, you're a genius; if you're a woman, you're difficult.
Martine McCutcheon