This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...espan — in all those aspects of existence which are open to his choice.
read full book
Man cannot survive as anything but man. He can abandon his means of survival, his mind, he can turn himsel
f into a subhuman creature and he can turn his life into a brief span of agony — just as his body can exist for a while in the process of disintegration by disease. But he cannot succeed, as a
subhuman, in achieving anything but the subhuman — as the ugly horror of the antirational periods of mankind’s history can demonstrate. Man has to be man by choice — and it is the task of...