In life, it is always easier to pull down than to build up. A building might take years to construct but can be demolished in only a few days. A painting can be the result of years of dedication by an artist, but a single match can destroy it in seconds. The character of a person can be built over a lifetime but destroyed in a moment! How sad that to destroy seems more natural than to build up.
The Apostle Paul had a great desire to help the Thessalonians to be built up in their faith. He prayed for them, wrote to them, and wanted to visit them. He made every effort to support and encourage these Christians. He wanted them to start encouraging each other. When one was weak, another could bring comfort. When one was confused, another could show them the truth. Instead of fighting with each other, they were asked to build each other up.
Have you ever questioned whether you bring encouragement to others? In doing so you can be encouraged in turn. When believers strengthem each other a unity is established and the Lord blesses. Discouragement, though, brings division. Stop and consider how you could encourage someone in their service for God.