To Alain Badiou, the pressing question is not how we should deal with differences – celebrate, respect, tolerate or fight them – but how an event may render differences, which until now have seemed natural or self-evident, inconsequential. The current debate concerning tolerance is dominated by the implicit assumption that this issue is of universal interest and relevance. However, tolerance implies recognition of a number of concepts – such as the person, the individual, and the self – which are not universally recognized. Introducing some crucial concepts of Badiou and Lacan, this article contends that the concept of tolerance is linked to a particular philosophical tradition.