The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature. Marcus Aurelius
The idea of the sacred is quite simply one of the most conservative notions in any culture, because it seeks to turn other ideas - uncertainty, progress, change - into crimes. Salman Rushdie
Nothing is more capable of troubling our reason, and consuming our health, than secret notions of jealousy in solitude. Aphra Behn
As a member of this court I am not justified in writing my private notions of policy into the Constitution, no matter how deeply I may cherish them or how mischievous I may deem their disregard. Felix Frankfurter
To prejudge other men's notions before we have looked into them is not to show their darkness but to put out our own eyes. John Locke
A hunter has no mysterious notions about the forest. Shona Proverb