Q3. (Colossians 3:8) Why are sins of the tongue so easy to slip into?
Sins of the tongue are the behavior of the world; they're around us everyday, we're exposed to them constantly. Like a sponge, we soak them up and exude them out because the unsaved world expect us to. Just as it is easy to alter your speech after being exposed to a dialect or language, exposure to 'sins of the tongue' causes us to slip into that behavior; almost without though. .
In what ways do they damage us and others?
Many of these sins tear people down and tear down relationships; making us (as followers of Christ) appear to be no different than anyone else. This damages our testimony and shows the world that we're not really different; we merely claim to be. Worse still, some of these sins destroy others by spreading things that should remain secret or worse--by telling things that simply are untrue.
How can we break free of sins of the tongue?
Each time we catch ourselves slipping, stop, pray for forgiveness from the Lord, and ask for forgiveness from those who have heard us. After repeating this behavior, we will be less inclined to speak without thinking.