"Let man enjoy himself; let the human race find pleasure in a thousand and one ways; let evolutionary mankind explore all forms of legitimate self-gratification, the fruits of the long upward biologic struggle. Man has well earned some of his present-day joys and pleasures. But look you well to the goal of destiny! Pleasures are indeed suicidal if they succeed in destroying property, which has become the institution of self-maintenance; and self-gratifications have indeed cost a fatal price if they bring about the collapse of marriage, the decadence of family life, and the destruction of the home -- man's supreme evolutionary acquirement and civilization's only hope of survival." 

[84:8.6]