John Calvin’s prayer based on Jeremiah 20:7 – 9

Grant, Almighty God, that as at this day a greater and viler impiety breaks forth than at any age, and thy sacred truth is treated with derision by many of Satan’s drudges — O grant, that we may nevertheless constantly persevere in it, nor hesitate to oppose the fury of all the ungodly, and relying on the power of thy Spirit, contend with them until that truth, which thou didst once proclaim by thy Prophets, and at length by thine only-begotten Son, and which was sealed by his blood, may attain its full authority, that as it proves to many the savour of eternal death, so it may also be a pledge to us of eternal salvation, until we shall be gathered into thy kingdom at the coming of the same thy Son Jesus Christ.
Amen.

(HT: Publican Chest | source)