One main goal of Satan in a believer's life is to drive a wedge between them and God. And what better time to attempt that then during calamity? It is a period when emotions are raw and faith is questioned. We are at our weakest, and confusion can lead to fear.
Being self controlled and alert means I need to stay in charge of my emotions and decisions. But circumstances have me at a disadvantage right now. How blessed I am to know where my strength comes from. And I also know how this whole story ends.