No other shall say nay may mean -- NO-Other (Nuit) shall pronounce the word No, uniting the Aspirant with Herself by denying and so destroying that which he is.
The general meaning of this verse is that so great is the power of asserting one's right that it will not long be disputed. For by doing so one appeals to the Law. In practice it is found that people who are ready to fight for their rights are respected, and let alone. The slave-spirit invites oppression.