Jesus asked us to be salt and light. How can we be salt and light in this world, this culture? Before attempting to answer that question, let us consider this.
Just because our culture is post modern (21st century) does not mean that scripture has changed or our role as Christians has changed. Even if we live in what some are calling a post-Christian society, does not mean that those of us who remain Christians should live any different that in Jesus' time. We can still be salt and light. In Matthew 10: 8 Jesus asks that we heal the sick, raise the dead, cleanse those who have leprosy,and drive out demons. Would some people think that was strange? Yes, and guess what... people thought it was strange in Jesus' times too.
If you are not comfortable with doing that, then at least pray for those that are sick, pray for those that have died and those that have serious illness or skin disease and pray that evil be conquered through prayer.
Most of all, pray that His Kingdom Come, His will be done! Be mindful of your mouth, your words... be salt and light by praising God our Lord and Savior Jesus Christ.