Paraphrase the following information in one sentence and cite the source in the context.
'Only armchair politicians are immune from committing mistakes.Errors are inherent in political action.Those who are in the centre of political struggle,who have to deal with practical and pressing problems,are afforded little time for reflection and no precedents to guide them and are bound to sleep up many times.' (Conversation with myself by Nelson Mandela.London:Macmillan,2010,page 35)
'Only armchair politicians are immune from committing mistakes.Errors are inherent in political action.Those who are in the centre of political struggle,who have to deal with practical and pressing problems,are afforded little time for reflection and no precedents to guide them and are bound to sleep up many times.' (Conversation with myself by Nelson Mandela.London:Macmillan,2010,page 35)