A fourth-grade reader may be a sixth-grade mathematician. The grade is an administrative device which does violence to the nature of the developmental process.
Science is a willingness to accept facts even when they are opposed to wishes.
I don't believe in God, so I'm not afraid of dying.
If freedom is a requisite for human happiness, then all that’s necessary is to provide the illusion of freedom.
Behavior is determined by its consequences.
A culture must be reasonably stable, but it must also change, and it will presumably be strongest if it can avoid excessive respect for tradition and fear of novelty on the one hand and excessively rapid change on the other.