The best Quotations

Do you know the writers of the following quotations?

Quotation To act from pure benevolence is not possible for finite human beings, Human benevolence is mingled with vanity, interest, or some other motive. - writer
Quotation The function of socialism is to raise suffering to a higher level. - writer
Quotation Always vote for principle, though you may vote alone, and you may cherish the sweetest reflection that your vote is never lost. - writer
Quotation If a man does not know what port he is steering for, no wind is favorable to him. - writer
Quotation Seek not to understand that you may believe, but believe that you may understand. - writer
Quotation In the long run we are all dead. - writer