It is through our “deeds” that the “brightness” of our “light can be shed upon the whole earth.”

Strive that ye may be enabled to manifest to the peoples of the earth the signs of God, and to mirror forth His commandments. Let your acts be a guide unto all mankind, for the professions of most men, be they high or low, differ from their conduct. It is through your deeds that ye can distinguish yourselves from others. Through them the brightness of your light can be shed upon the whole earth. Happy is the man that heedeth My counsel, and keepeth the precepts prescribed by Him Who is the All-Knowing, the All-Wise. (Baha'u'llah, ‘Gleanings from the Writings of Baha'u'llah’; The Baha’i World 2002-2003)