Nothing great has been and nothing great can be accomplished without passion. It is only a dead, too often, indeed, a hypocriticalmoralizing which inveighs against the form of passion as such.

Mere goodness can achieve little against the power of nature.

Whatever happens, every individual is a child of his time; so philosophy too is its own time apprehended in thoughts. It is just as absurd to fancy that a philosophy can transcend its contemporary world as it is to fancy that an individual can overleap his own age, jump over Rhodes.

Genuine tragedy is a case not of right against wrong but of right against right - two equally justified ethical principles embodied in people of unchangeable will.

It is because the method of physics does not satisfy the comprehension that we have to go on further.

In duty the individual acquires his substantive freedom

The first glance at History convinces us that the actions of men proceed from their needs, their passions, their characters and talents; and impresses us with the belief that such needs, passions and interests are the sole spring of actions.