In "Serving Others vs Serving Self", Allen McGraw relates an incident in which someone implied that he preached too much about serving others and not personal holiness. Allen is a United Methodist pastor and seminary student who authors the Methodist Corner blog.
He cites Mark 12:28-34 and states that you can't separate personal holiness from serving others.
This reminds me of the periodic tension between those fervently advocating an evangelism-only approach to outreach vs. those who lean toward a service-only approach. The reality of where Wesley fit was between those two extremes, folks. He preached the gospel and also served the poor and needy.
Allen has it pegged -- if you have real personal holiness, you'll have a true desire to help others. Good deeds flow from faith in God. Good deeds are then God deeds -- we are the vessels of his love.