The best Quotations

Do you know the writers of the following quotations?

Quotation If fifty million people say a foolish thing, it is still a foolish thing. - writer
Quotation Has God forgotten all I have done for Him. - writer
Quotation It is mediocrity which makes laws and sets mantraps and spring-guns in the realm of free song, saying thus far shalt thou go and no further. - writer
Quotation Our happiness depends on wisdom all the way. - writer
Quotation Sincerity makes the very least person to be of more value than the most talented hypocrite. - writer
Quotation Taste is tiring like good company. - writer