If I become so convinced that ‘I’m always right,’ the logical conclusion of that often ends up being great cruelty and great violence.

Speaking during a discussion at "Kirchentag," a multi-day meeting sponsored by the Protestant church in Germany in Berlin, Germany on May 25, 2017. Source: Dovere, Edward-Isaac (25 May 2017). "Obama in Berlin: 'We can’t hide behind a wall'". Politico. Archived from the original on 2 June 2017. Retrieved 2 June2017.