Calvin's Commentaries, Vol. 17: Jeremiah and Lamentations, Part I, tr. by John King, [1847-50], at sacred-texts.com

THE PRAYER
WHICH JOHN CALVIN WAS WONT TO USE AT THE BEGINNING OF HIS LECTURES:

MAY the Lord grant, that we may engage in contemplating
the mysteries of his heavenly wisdom with really increasing devotion,
to his glory and to our edification. AMEN.