F.B. Meyer emphasizes the role of Christians as the 'salt and light' of society, highlighting that living a consistent and holy life will often lead to persecution, as the world resists the light that exposes wrongdoing. He encourages believers to maintain their 'saltness' to combat corruption and to shine brightly as a reflection of God's nature, warning against losing their influence. Meyer reassures that even in suffering, Christ walks alongside His faithful followers, and urges believers to be mindful of their impact on the world around them.