Without an educated populace, democracy cannot sustain itself.
A President cannot always be popular.
He who cannot eat horsemeat need not do so. Let him eat pork. But he who cannot eat pork, let him eat horsemeat. It's simply a question of taste.
Whatever you cannot understand, you cannot possess.
The reconnection of society, economy and ethics is a project we cannot postpone.
Money is the root of all evil, and yet it is such a useful root that we cannot get on without it any more than we can without potatoes.
Unlike science, creationism cannot predict anything, and it cannot provide satisfactory answers about the past.
Life cannot arise spontaneously but comes only from preexisting life.
You cannot simultaneously prevent and prepare for war.
One cannot prescribe to anyone whether he should follow an ethic of absolute ends or an ethic of responsibility.
We must admit with humility that, while number is purely a product of our minds, space has a reality outside our minds, so that we cannot completely prescribe its properties a priori.
If you keep feeling a point that has been sharpened, the point cannot long preserve its sharpness.
Priesthood is forever and does not cease when a priest cannot carry out that priestly ministry.
When you have a prime minister who is corrupt, then you can be sure that a country cannot be anything else but corrupt.
Unless a president can protect the privacy of the advice he gets, he cannot get the advice he needs.
If Congress doesn't raise taxes, you cannot get a private investment account without forgoing a portion, possibly all, of your guaranteed benefit check.
I simply cannot vote for Senator Obama because he's not pro-life.
Rather than allowing jihadists to shut down debate, it must proliferate so much that they simply cannot kill us all.
If we attend continually and promptly to the little that we can do, we shall ere long be surprised to find how little remains that we cannot do.
Argument is to me the air I breathe. Given any proposition, I cannot help believing the other side and defending it.