What is the purpose of life?

No given purpose (atheism)

Many people without a religion hold that life has no purpose given to it from outside. Bertrand Russell, the British philosopher, argued that a person's thinking cannot outlive the brain. He wrote that he believed he would rot when he died. Happiness, thought and love keep their value, he said, even though they come to an end. On this view, each person must make their own meaning.