Morality makes stupid.- ...

Morality makes stupid.- Custom represents the experiences of men of earlier times as to what they supposed useful and harmful - but the sense for custom (morality) applies, not to these experiences as such, but to the age, the sanctity, the indiscussability of the custom. And so this feeling is a hindrance to the acquisition of new experiences and the correction of customs: that is to say, morality is a hindrance to the development of new and better customs: it makes stupid.
Morality makes stupid.- Custom represents the experiences of men of earlier times as to what they supposed useful and harmful - but the sense for custom (morality) applies, not to these experiences as such, but to the age, the sanctity, the indiscussability of the custom. And so this feeling is a hindrance to the acquisition of new experiences and the correction of customs: that is to say, morality is a hindrance to the development of new and better customs: it makes stupid.

Quotes from the same author

Rejoicing in our joy, not suffering over our suffering, makes someone a friend.
You need chaos in your soul to give birth to a dancing star.
Love is blind; friendship closes its eyes.
We love life, not because we are used to living but because we are used to loving.
The man of knowledge must be able not only to love his enemies but also to hate his friends.