This little tidbit from struck me as amazingly, seriously and sort of humorously on target:
The weakness that many Christians encounter today is that of frustration. While the modern emphasis on efficiency has produced quick ways to do many things, there is no shortcut to effective evangelism. This may be the single biggest challenge that Western missionaries will face in the twenty-first century. They are not skilled at facing frustration, but if they are to be effective missionaries they will have to master that skill.
Ajith Fernando, Sharing the Truth in Love, p.57