The worst fight is the one that is not done (Karl Marx)

Karl Marx, a great German philosopher, sociologist and economist, means with this phrase that if we do not fight for something we want, it is impossible for us to achieve our purpose and objective. Marx, with this famous sentence, referred to the socio-economic context and the class struggle in which he has been a very influential thinker. Even so, this phrase can be used in the day to day of people.