"To be in direct contact with nature and not with men is the only discipline. To be dependent on an alien will is to be a slave. This, however, is the fate of all men. The slave is dependent on the master and the master on the slave. This is a situation which makes us either servile or tyrannical or both at once (omnia serviliter pro dominatione). On the contrary, when we are face to face with inert nature our only resource is to think."