The best Quotations

Give the people a new word and they think they have a new fact.
- Willa Cather

Do you know the writers of the following quotations?

Quotation Exclusively of the abstract sciences, the largest and worthiest portion of our knowledge consists of aphorisms: and the greatest and best of men is but an aphorism. - writer
Quotation I live in that solitude which is painful in youth, but delicious in the years of maturity. - writer
Quotation For us in Russia communism is a dead dog. For many people in the West, it is still a living lion. - writer
Quotation Much may be made of a Scotchman, if he be caught young. - writer
Quotation It has been said that Democracy is the worst form of government except all those other forms that have been tried from time to time. - writer
Quotation That which we call sin in others, is experiment for us. - writer