One's appearance bespeaks dignity corresponding to the depth of his character. One's concentrated effort, serene attitude, taciturn air, courteous disposition, thoroughly polite bearing, gritted teeth with a piercing look - each of these reveals dignity. Such outward appearance, in short, comes from constant attentiveness and seriousness.
Throughout human history, in any great endeavour requiring the common effort of many nations and men and women everywhere, we have learned - it is only through seriousness of purpose and persistence that we ultimately carry the day. We might liken it to riding a bicycle. You stay upright and move forward so long as you keep up the momentum.