As far as your self-control goes, as far goes your freedom.

[So weit Deine Selbstbeherrschung geht, so weit geht Deine Freiheit.]

Marie von Ebner-Eschenbach (1830-1916) Austrian writer

Aphorisms [Aphorismen], No. 534 (1880)
    (Source)

(Source (German)). Alternate translation:

Freedom stretches as far as your self-control.
[tr. Scrase/Mieder (1994)]