What a terrible day in Paris! People in general, but the Parisian in particular, needs to know that they are safe even when they are pressed into the reality–as we all are!–of the circumstances of the day, that they really aren’t; at least not humanly speaking. As the events of November 13th, 2015 illustrated in an horrific and unimaginable way, the Parisian today needs to know that even if such horrific types of events intersect with their lives and their psyches, that God in Jesus Christ is for them; that He loves them, and that He demonstrated this love for them at His cross (cf. Romans 8.6). The Parisian needs to know and rest in the evangelical reality that God in His providential care has them in His big hands, and that no-one can pluck them out of His hands, not even a terrorist with a Kalashnikov or hand grenade. The Parisian knows better, or as well as anyone else today, how fragile this life is, and how the circumstances of life can change in an instant and in a very violent way! In the face of this they need prayer; they need dialogue with the Triune God who loves them, He desires that the Parisian would cry out to Him, and seek their rest and security in Him and in His mighty care. French theologian, Jean Cauvin or John Calvin says this to his countrymen about their need for prayer, and what it will supply for them in this very trying time,
Words fail to explain how necessary prayer is, and in how many ways the exercise of prayer is profitable. Surely, with good reason the Heavenly Father affirms that the only stronghold of safety is in calling upon his name [cf. Joel 2:32]. By so doing we invoke the presence both of his providence, through which he watches over and guards our affairs, and of his power, through which he sustains us, weak as we are and well-nigh overcome, and of his goodness, through which he receives us, miserably burdened with sins unto grace; and, in short, it is by prayer that we call him to reveal himself as wholly present to us. Hence comes an extraordinary peace and repose to our consciences. For having disclosed to the Lord the necessity that was pressing upon us, we even rest fully in the thought that none of our ills is hid from him who, we are convinced, has both the will and the power to take the best care of us.
I cannot think of a more timely word from Calvin for our French-Parisian compatriots. The reality is that things like this can continue to happen, in Paris and elsewhere; and they most likely will! Is the ultimate answer for individual people going to be live in fear and paranoia; is the answer going to be for more surveillance, or the boning up of weaponry, is that the answer? No, the answer as Calvin has so eloquently lain bare, is for the Parisian to talk with God; to pray. To commit themselves into His hands, and it will only be here where an ‘extraordinary peace’ and sense of security will take hold; as the petitioner to God finds this in the One who holds all things together in His big hands and by the word of His power.
I am praying for the Parisians today, please join me! le Seigneur a pitié !
 John Calvin, Institutes II/2, 851.