The challenge of being salt and light - Matthew 5:13-16

Matthew 5:13-16 New International Version (NIV)
13 “You are the salt of the earth. But if the salt loses its saltiness, how can it be made salty again? It is no longer good for anything, except to be thrown out and trampled underfoot.
14 “You are the light of the world. A town built on a hill cannot be hidden. 15 Neither do people light a lamp and put it under a bowl. Instead they put it on its stand, and it gives light to everyone in the house. 16 In the same way, let your light shine before others, that they may see your good deeds and glorify your Father in heaven.

The Church is made up of people attempting to be disciples of Jesus Christ.  It is made up of people who have been called from a state of living in darkness, who have been introduced to the light of the Gospel (the Good News of the death and resurrection of Jesus Christ on their behalf), and who by the power of the Gospel (through the Holy Spirit) have been transformed in their hearts and minds.  It is the will of God that those people, set free from bondage to sin, but not yet fully transformed to Christ-likeness, should remain living upon the earth to act as the "salt and light" that Jesus commanded them to be.  This is where it gets difficult.  Exactly how these redeemed, but not yet fully sanctified, disciples of Jesus can remain pure (salt) and at the same time live and minister in a world that remains dark (where they are to be a light) does not have a one-size-fits-all answer.
One option that has been tried from time to time in Church history has been that of withdrawal from society.  Beginning in the Early Church with hermits who literally withdrew to lonely places to avoid much of human contact, or even the Stylites ("pillar-dwellers" primarily in Syria) who lived at the top of stone pillars, to the later development of Monasticism where those living withdrawn from society did so in a community of like-minded people.  Without downplaying the importance of the monastic system for preserving knowledge from the Fall of Rome until the Renaissance, none of these attempted solutions were full answers to the command of Jesus, for while they may have been helpful in preserving purity (saltiness) they were at best only partly effective in sharing the Gospel with the Lost (being light).  If you withdraw from society, you may cut down on its ability to influence you toward immorality, but how can you influence it toward righteousness.  The same holds true for interactions with individual people, much of our potential sin involves interacting with other people, and so avoiding people might lead to less sin, but at the same time, most of our potential for righteous deeds involves interactions with other people, and curtailing those interactions will decrease righteousness as well.
Because withdrawal can, at best, only be a half or partial measure, the heart of the matter is how Christians can remain on the path of increasing Christ-likeness, thus preserving their saltiness, while at the same time engaging with the culture and people among whom they live so that their light will shine in the darkness.  The first step for any individual Christian in his/her need to be both "salt" and "light" is for that individual to not attempt the task as merely an individual Christian.  Like the Apostles that Jesus called to be in a community with him, and the other men and women who followed his ministry, Christians of every era, no matter how hostile or cooperative the culture they live in, need to be a part of something more substantial and more stable than anything they can do on their own.  The community created by Jesus, specifically for that purpose, is the Church.
How then does the Church help individual Christians retain their "saltiness" and enable their "light" to shine?  The purity (moral character) of individual Christians is enhanced and strengthened when they interact regularly with each other in community worship, prayer, service, and mentoring relationships.  It is easier to accomplish a difficult task, and rejecting sinful impulses to embrace a servant's heart of righteous self-sacrifice certainly qualifies as a difficult task, when attempting that task as part of a team.  Having other Christians by your side, to serve as both examples of how victory is possible, and to correct us when we go astray, is a boon whose worth cannot be calculated.  In addition, our ability to be a light in our community, to witness to the truth of the Gospel, is also enhanced by our connection to the community of believers.  One candle shining in the darkness will draw attention, yet it is difficult for that one light to sufficiently illuminate the way for others, but dozens of people holding lit candles will function more as a lighthouse or beacon.  For example: When a Christian participates in a ministry of the local church to which he/she belongs, like volunteering at a food pantry that the church runs, he/she not only gains valuable character shaping experience, but also is participating in an outreach effort that demonstrates to the Lost the love of God for them reflected in the love of God's people for them.
We don't expect all of our interactions as a Christian to be connected to our Church, at work and with our family and friends we will often be apart from the support and group effort of that community, but having the local church as one of the most significant aspects of our lives will absolutely make it easier for us to continue to be "salt" and "light" in those instances as well.

How important is your church community in your life?

How important is it to you to be in church on Sunday, to worship, pray, learn, and serve with God's people?

If you are a follower of Jesus Christ, you are commanded to be "salt" and "light", it is not optional, to accomplish that task you need to be a part of the community that Jesus created.