… is from page 63 of F.A. Hayek’s last book, his 1988 The Fatal Conceit  (citations omitted):
The question then is how to secure the greatest possible freedom for all. This can be secured by uniformly restricting the freedom of all by abstract rules that preclude arbitrary or discriminatory coercion by or of other people, that prevent any from invading the free sphere of any other. In short, common concrete ends are replaced by common abstract rules.