The best Quotations

As i approve of a youth that has something of the old man in him, so i am no less pleased with an old man that has something of the youth. he that follows this rule may be old in body, but can never be so in mind.
- Marcus Tullius Cicero

Do you know the writers of the following quotations?

Quotation He who is brave is free. - writer
Quotation Sound character provides the power with which a person may ride the emergencies of life instead of being overwhelmed by them. Failure is... the highway to success. - writer
Quotation Opinion is ultimately determined by feelings, and not by the intellect. - writer
Quotation One cannot weep for the entire world, it is beyond human strength. One must choose. - writer
Quotation The friend in my adversity I shall always cherish most. I can better trust those who helped to relieve the gloom of my dark hours than those who are so ready to enjoy with me the sunshine of my prosperity. - writer
Quotation We are here on earth to do good to others. What the others are here for, I don't know. - writer