look out for number one

— S.—Ah—get out. Look out for number one—that's my doctrine; and let others do the same;—and if they don't, why, the flats must be contented with being gulled—that's all. It is n't my look-out, if a man does n't know enough, or does n't think enough, or is n't careful enough: if I can shave him a little by fair and honorable means, I have a right to do so. F.—You learnt that creed in Foolsborough; you'll recant in Gallowsberg, if you do n't look out. As to your shaving, my boy, if you do n't get pretty cleverly shaved with a handsaw, it will be because the dressing-room of Providence is too respectable for lubberly fellows like you.