Galatians 6:1

"Brothers, if someone is caught in a sin, you who are spiritual should restore him gently. But watch yourself, or you also may be tempted." NIV translation

In chapter 5, Paul talked about how we are to walk in the Spirit. For most of us, that requires sight which requires eyes. When this verse talks about someone "caught in a sin", it is not talking about us seeing them committing acts of sin (seeing them with our physical eyes) it is talking about seeing them struggling in their spirit with the things of God (seeing them with our spiritual eyes). When Paul talks of restoring him gently, he is saying that we are not to beat a Christian up with the law but to see the battle that is going on inside of them and to remember that we all have similar battles going on at different times. We can reassure them of God's mercy and grace as well as His power given to them to overcome whatever they are struggling with. We must watch ourselves so that we do not get to thinking too highly of ourselves and thinking we are some kind of super Christians. That is pride and it is the same thing that caused the fall of Lucifer.

Galatians 6:2

"Carry each other's burdens, and in this way you will fulfill the law of Christ." NIV translation

In Matthew 22:37-40, Jesus showed us what Paul is talking about when he says "the law of Christ". Jesus told us that we are to "Love your neighbor as yourself". That is what Paul is saying here in that, when we see others (especially our fellow Christians) who are struggling, we are to come alongside them to help. This requires us to put their needs above our own plans and desires. 

Some of these burdens are easy to spot with our physical eyes such as those who are homeless, hungry, or struggling with an addiction. Other burdens such as struggles in their walk with Christ can only be recognized through our "spiritual eyes".

Galatians 6:3

"If anyone thinks he is something when he is nothing, he deceives himself." NIV translation

Many of us can fall into a trap when we look at ourselves through our natural eyes. The natural eyes see our surroundings and we can get to thinking that we are all that instead of remembering that all of us are saved by the same grace of God.