What will help our argument 'see light', according to the passage?

Read the passage and answer the question that follows.

Whether the argument is oral or written, the active purpose is to make the other person take your view of the subject. In an explanation we put forth our personal attitude before others but in an argument, we realize people are having a different view on the same subject. So we use two weapons – one is of conviction and the other of persuasion. We try to prove the authenticity of our criteria by convincing others, using practical examples so that the other party comes round to our point of view. We also use moralizing to bring more partisans to our view. But when this lacks practical touch it can be called persuasion. If you put forth that the shape of hills in New England is due to glaciers, you are first trying to persuade. Since here logic is lacking, it cannot be convincing. Human thinking and feeling also comes to rescue. The first reaction could be spontaneous due to feeling but reasoning does come later. So in all arguments one must keep in mind both the forces so that our criterion sees light.