"Jesus answered and said to them, 'You are mistaken, not knowing the Scriptures nor the power of God.' "
The sure way to error is through ignorance. There are two particular areas of which we cannot afford to be ignorant: the Scriptures, and the power of God. When we do not know the Bible, we are easy prey to the world's and the devil's false gospels. When we do not know the power of God, we think we have something to do with our salvation.
God has given us the means of grace. In and through them, let us learn, know, and live the gospel of Christ.
[Puritan quote of the day: "Believing in Christ is the great thing that God presses upon sinners throughout the Scripture, as all know that know anything of Scripture." --Thomas Brooks, in "Precious Remedies against Satan's Devices"]