John Calvin was younger than Martin Luther, and had a great respect for him. Sometimes painted as rivals, or even enemies, the truth is more complex. This, for example, is an amazing ending for a letter that Calvin wrote to Luther:
In a letter which Calvin wrote to Luther, but which he never received or read, for Luther’s friend Melachton, did not think it advisable to deliver it to him, Calvin asked Luther’s opinion about a certain matter which gave him much trouble. Beautiful and magnificent is the ending of this letter.
“For I would preferably converse with you personally, not only on this matter, but also on other matters. But that which is not granted to us on earth, will presently, I hope, be imparted to us in the Kingdom of God. Hail to you, most excellent man, servant of Christ, and honoured father. May God bless you always through his Spirit until the end, to the mutual well being of his church.”