Read it through once

“You didn’t want to come. The average man don’t like trouble and danger. _You_ don’t like trouble and danger. But if only _half_ a man—like Buck Harkness, there—shouts ‘Lynch him! lynch him!’ you’re afraid to back down—afraid you’ll be found out to be what you are—_cowards_—and so you raise a yell, and hang yourselves on to that half-a-man’s coat-tail, and come raging up here, swearing what big things you’re going to do. The pitifulest thing out is a mob; that’s what an army is—a mob; they don’t fight with courage that’s born in them, but with courage that’s borrowed from their mass, and from their officers. But a mob without any _man_ at the head of it is _beneath_ pitifulness. Now the thing for _you_ to do is to droop your tails and go home and crawl in a hole. If any real lynching’s going to be done, it will be done in the dark, Southern fashion; and when they come they’ll bring their masks, and fetch a _man_ along. Now _leave_—and take your half-a-man with you”—tossing his gun up across his left arm and cocking it when he says this.