While the Genevans were pulling at him on the one side, the city authorities and the ministers of Strassburg were pulling, with equal energy, on the other and, in a letter to Nicolas Parent, Calvin says: “I am so perplexed or, rather, confused in my mind as to the call from Geneva that I can scarcely venture to think what I ought to do.” By degrees, however, light began to rise in his darkness. He began to see that Geneva was the only place in which there was any chance of establishing the worship of God and the discipline of the church as they ought to be established. In France, there was no city in which the Reformed faith could be safely professed. In Germany, there was no city which was politically independent. But, in Geneva, the Reformed faith was dominant and the city was entirely free from external control. It was the one city in Europe in which his conceptions could be realized. In a letter to the Council of Geneva, written from Strassburg (February 19, 1541), he practically intimates his willingness to return as soon as the way is open to him.
From: John Calvin: His Life, Letters, and Work by Hugh Y. Reyburn (London: Hodder and Stoughton, 1914), p. 106.