
Though this statement and a few other variants of it have been widely attributed to Herman Melville, it is actually a paraphrase of one found in a sermon of Henry Melvill, "Partaking in Other Men's Sins", St. Margaret's Church, Lothbury, England (12 June 1855), printed in Golden Lectures (1855) :
: There is not one of you whose actions do not operate on the actions of others—operate, we mean, in the way of example. He would be insignificant who could only destroy his own soul; but you are all, alas! of importance enough to help also to destroy the souls of others. ...Ye cannot live for yourselves; a thousand fibres connect you with your fellow-men, and along those fibres, as along sympathetic threads, run your actions as causes, and return to you as effects.
Misattributed