In academic life, false ideas are merely false and useless ones can be fun to play with. In political life, false ideas can ruin the lives of millions and useless ones can waste precious resources. An intellectual's responsibility for his ideas is to follow their consequences wherever they may lead. A politician's responsibility is to master those consequences and prevent them from doing harm. Michael Ignatieff, a former professor at Harvard and contributing writer for the magazine, is a member of Canada's Parliament and deputy leader of the Liberal Party.

You're never really out of politics.

We must not lose sight of the fundamental issue of policy which is that people who come to the country on visa status must never be abused.

There are a lot of young Canadians who want to be politically active at their college or their university who can't go to the party convention, who can't take part in politics, because they're holding down a job to pay their tuition. These are kids who want to do public service, who want to get involved politically, but their financial situation is precarious.

Memory is the only afterlife I have ever believed in. But the forgetting inside us cannot be stopped. We are programmed to betray.

There are all kinds of different forms of public service, but there's no form of public service that can make more difference for more people than partisan political activity.

Those with a gift for action, for their part, often express contempt for those whose gifts are more reflective. Men of action like to say, Those who can, do, those who cant, teach, forgetting that those who teach get to write the history books.