“When they saw him they worshiped him, but some doubted” (Matthew 28:17).

“Some doubted.” Yes, even when looking at the resurrected Christ.

What can we learn from this? We can learn that while we are still in this world—even if we were to see Jesus with our own eyes—we sometimes struggle with doubt. If this was difficult for the disciples who stood staring right at Jesus, how much more necessary is it for us today!

I came across a helpful discussion of this mingling of faith and doubt in Calvin’s Institutes. I offer it here to encourage those of us who find our faith mingled with doubt—who cry with the father of the demon-possessed child, “I do believe; help me overcome my unbelief!” (Mark 9:24). (Note: I’m using Henry Beveridge’s translation. For clarity’s sake, I have updated the language and taken the liberty to paraphrase in some places).

The believer finds within himself two principles: the one filling him with delight in recognizing the divine goodness, the other filling him with bitterness under a sense of his fallen state; the one leading him to recline of the promise of the Gospel, the other alarming him by the conviction of his iniquity; the one making him exult with the anticipation of life, the other making him tremble with the fear of death. These principles are due to the imperfection of our faith. For, in this present life, we are never fully cured of the disease of distrust. We are never quite completely engulfed in perfect faith. That is why we feel those inner conflicts.

But this does not mean that faith is an obscure and confused understanding of God’s will. Even though we may be harassed by various doubts, it does not follow that we are divested of faith. Though we are agitated and carried to and fro by distrust, we are not immediately plunged into the abyss. Though we are shaken, we are not driven from our place.

The certain outcome of this struggle is this: that faith in the long run triumphs over the difficulties which try to bring it down.

Why? Because of the nature of true saving faith. As soon as the minutest particle of genuine faith is instilled into our minds, we begin to behold the face of God—in peace and favor toward us. We behold him, though far off, yet so distinctly as to assure us that there is no delusion in it.

-Adapted from Calvin’s Institutes Book 3, Chapter 2, Sections 18 and 19.

“The heavens declare the glory of God.” Every day, to each human being, the universe tells us something: There is a creator, and he is unimaginably powerful.

For centuries, people have called this “the Book of Nature,” or, to use a theological term, “general revelation.”

But it is obvious that something has gone wrong with this “Book of Nature,” this story of God’s glory. At the very least, something has gone wrong with our ability to read it right. The words seem to be smudged. Important pages are missing. In fact, the more closely we look, we will notice that there is another story written between the lines—a tragic tale of selfishness, rebellion, despair, and, finally, death.

This is not the story of the original Author. Rather, it was edited by our own sin and rebellion, as we are told in Genesis 3:17-19:

Cursed is the ground because of you [Adam]; in pain you shall eat of it all the days of your life; thorns and thistles it shall bring forth for you; and you shall eat the plants of the field. By the sweat of your face you shall eat bread, till you return to the ground, for out of it you were taken; for you are dust, and to dust you shall return.”

The Apostle Paul expresses it this way in Romans 8:20: “The creation was subjected to futility,” and is in “bondage to corruption” (Romans 8:21).

This “futility” and “bondage” is part of the reason that on one night we might look up at the stars and say, “What a Creator!” And on another day, we look at the decay all around us, and say, “Vanity of vanities! All is vanity!”

It is because of human sin that humans fail to read the book of nature as we should. This is what Paul is talking about in Romans 1:19-21, when he writes,

For what can be known about God is plain to them, because God has shown it to them. For his invisible attributes, namely, his eternal power and divine nature, have been clearly perceived, ever since the creation of the world, in the things that have been made. So they are without excuse. For although they knew God, they did not honor him as God or give thanks to him, but they became futile in their thinking, and their foolish hearts were darkened.

There is enough in the Book of Nature to show us that there is a God and that he is unimaginably powerful and glorious. But the Book of Nature is powerless to teach us why we are in such a predicament, why we feel so wretched and still long for light and salvation. It is powerless to teach us how to have a right relationship with God.

And that’s why we need another book, the Book of Scripture.

The more I read, study, memorize, and meditate on it, the more I realize that God’s Word is what I need. All the time.

It is the power that brought the universe into existence (Genesis 1:3).

It is the seed that brings you to life (1 Peter 1:23; James 1:21).

It is the truth that sanctifies and sets you free you (John 17:17; 8:31-32)

It is the light that guides you (Psalm 119:105).

It is the mirror that shows you who you are (James 1:23).

It is the joy and delight of the heart (Jeremiah 15:16; Psalm 1:2).

It is the river that makes you flourish (Psalm 1:3).

It is the water that washes you (Ephesians 5:26).

It is the course that educates you (Psalm 119:130).

It is the gold that enriches you (Psalm 19:10).

It is the bread that nourishes you (Matthew 4:4; Job 23:12).

It is the courage that emboldens you (Psalm 56:4).

It is the song that you sing (Colossians 3:16).

It is the sword that arms you for battle (Ephesians 6:17).

It is the breath of God (2 Timothy 3:16).

For these and many more reasons, “see that you do not refuse him who is speaking” (Hebrews 12:25).