For me, politeness is a sine qua non of civilization. Robert A. Heinlein
Taking charge of your own learning is a part of taking charge of your life, which is the sine qua non in becoming an integrated person. Warren G. Bennis
Fidelity to the subject's thought and to his characteristic way of expressing himself is the sine qua non of journalistic quotation. Janet Malcolm
We all learn in school that the judicial, legislative and executive branches of government must check and balance each other. But other non state institutions must participate in this important system of checks and balances as well. These checking institutions include the academy, the media, religious institutions and NGOs. Alan Dershowitz
What is a movie star? It is an illusion. It was everything I ever wanted to be, but it became a kind of shell, non? It was what made me famous and got me women. But it wasn't real. Jean Claude Van Damme