The best Quotations

All architecture is great architecture after sunset; perhaps architecture is really a nocturnal art, like the art of fireworks.
- Gilbert K. Chesterton

Do you know the writers of the following quotations?

Quotation There is no dependence that can be sure but a dependence upon one's self. - writer
Quotation Perfection is attained by slow degrees; she requires the hand of time. - writer
Quotation Variety is the condition of harmony. - writer
Quotation A bare assertion is not necessarily the naked truth. - writer
Quotation The exercise of power in this century has meant for all of us in the United States not arrogance, but agony. - writer
Quotation He makes no friends who never made a foe. - writer