This is our purpose: to make as meaningful as possible this life that has been bestowed upon us; to live in such a way that we may be proud of ourselves; to act in such a way that some part of us lives on.
Source, in full
As quoted in Good Advice (1982) edited by Leonard Safir and William Safire, p. 282; also quoted in "Aphorisms: From the Writings of Oswald Spengler", in The Journal of Historical Review (March-April 1998), Vol. 17, No. 2, p. 8, and in Wisdom from World Religions: Pathways Toward Heaven on Earth (2002) by John Templeton