The best Quotations

Do you know the writers of the following quotations?

Quotation It is not how much one makes but to what purpose one spends. - writer
Quotation In short, luck's always to blame. - writer
Quotation With mirth and laughter let old wrinkles come. - writer
Quotation We should live our lives as though Christ were coming this afternoon. - writer
Quotation There's nothing colder than chemistry. - writer
Quotation Poetry makes nothing happen. It survives in the valley of its saying. - writer