Either you repeat the same conventional doctrines everybody is saying, or else you say something true, and it will sound like it's from Neptune.
— Noam Chomsky

I wish to preach, not the doctrine of ignoble ease, but the doctrine of the strenuous life.
Theodore Roosevelt doctrine quote

Optimism - the doctrine or belief that everything is beautiful, including what is ugly.
— Ambrose Bierce

The older I grow the more I distrust the familiar doctrine that age brings wisdom.
— H. L. Mencken

You can judge the quality of their faith from the way they behave. Discipline is an index to doctrine.
— doctrine quotation by Tertullian