From D. Martyn LLoyd Jones "The Life of Joy" An exposition of Phillipians 1 and 2

Ah, my dear friend, no man lives to himself in this world.  What you and I do in the time of adversity and trouble is going to affect many others.  Is not this the one way to face life and it's troubles and tribulations... to see in it an opportunity of witnessing for Christ ? When the blow descends, say to yourself, here is a grand opportunity.  There will be people who are going to watch me, they know I am a church member and that I call myself a Christian, so they will look and say, 'Lets 's see how he stands up to this. Let's watch her, let's listen to their words.' And their is your opportunity to testify to the gospel.