Doing good ( Matthew 5 v 16)

I take an interest in the work of 'The missionary aviation fellowship',they work in 24 countries,and have about 124 airplanes operating in those countries.They are a Christian humanitarian organization,they do so much good,but they also work with churches,and seek to spread the gospel.Papua New Guinea is their largest programine with a fleet of 14 aircraft.I just read an article how the power of the gospel transformed two waring tribes,that today former enemies are running  a church -run   health service work. The gospel means good news to a very needy world,people come to know Christ as their Saviour,and become new creations,they are better people.As Christians we are told that we should do good works,(Ephesians 2 v 10) That's what MAF are doing,and many other organizations are doing,and if we are Christians that's what we should be doing.