To laugh often and much ... this is to have succeeded. Probably not from Emerson: here's the full quotation and the story.
Ralph Waldo EmersonWe have a great deal more kindness than is ever spoken. The whole human family is bathed with an element of love like a fine ether. How many persons we meet in houses, whom we scarcely speak to, whom yet we honor and who honor us! How many we see in the street, or sit with in church, whom though silently, we warmly rejoice to be with! Read the language of these wandering eye-beams. The heart knoweth.
Ralph Waldo EmersonIn the learned journal, in the influential newspaper, I discern no form; only some irresponsible shadow; oftener some monied corporation, or some dangler, who hopes, in the mask and robes of his paragraph, to pass for somebody. But through every clause and part of speech of the right book I meet the eyes of the most determined men; his force and terror inundate every word: the commas and dashes are alive; so that the writing is athletic and nimble,--can go far and live long.
Ralph Waldo Emerson