<p>5:13 <i>But all things when they are reproved are revealed by the light. For everything that is revealed then becomes light</i>- The day of judgment will be the ultimate bringing to light and manifesting of all supposedly hidden things (Mk. 4:22; 1 Cor. 4:5 s.w.). But we ahead of that time are used to reveal the hidden things; because light reveals, and we are the light of the world. But this is no call to become the Lord's forensic policemen, ever intent on uncovering the failings of others and constantly investigating vague hunches or conspiracy theories. Light reveals hidden things quite naturally; we as the light of the world by our nature and example will reveal and thereby reprove that which is in darkness. Likewise the revelation of human sin at the last day will largely be through the fact of sinners being in the personal presence of the Lord Jesus, just as happened during His ministry. His presence and personality of itself convicted people of their sins. The revelation of the hidden things in this life is so that those things revealed &quot;then become light&quot;, i.e. that there is real change and transformation. The revelation of hidden things at the last day will be too late. And we have noted throughout this section that Paul envisages a radical transformation now of darkness to light; he who steals now gives to the needy, the curser instead utters words of grace etc.</p>