Institutes of the Christian Religion: Chapters 9 and 10

(W)hat kind of Spirit did our Saviour promise to send? One who should not speak of himself (John 16:13), but suggest and instil the truths which he himself had delivered through the word. Hence the office of the Spirit promised to us, is not to form new and unheard-of revelations, or to coin a new form of doctrine, by which we may be led away from the received doctrine of the gospel, but to seal on our minds the very doctrine which the gospel recommends.

John Calvin, Institutes of the Christian Religion, Book One Chapter Nine

Regarding the Attributes of God revealed in Creation:

Assuredly, the attributes which it is most necessary for us to know are these three: Loving-kindness, on which alone our entire safety depends: Judgment, which is daily exercised on the wicked, and awaits them in a severer form, even for eternal destruction: Righteousness, by which the faithful are preserved, and most benignly cherished.

Institutes of the Christian Religion, Book One Chapter 10