Your holiness makes you as conspicuous as the sun in the sky. You cannot hide your Christian character. Love cannot be hidden any more than can light. Least of all, it cannot be hidden when it shines forth in action. When you exercise yourself in a labor of love, in any kind of good work, you are observed. We may as well try to hide a city as to hide a Christian. It is the purpose of God that every Christian should be in open view. We are to give light to all that are in the house.
Source: Sermon, “Upon Our Lord’s Sermon on the Mount: Discourse IV”