Catechism of the Catholic Church

547 Jesus accompanies his words with many "mighty works and wonders and signs", which manifest that the kingdom is present in him and attest that he was the promised Messiah. ²⁶⁸

548 The signs worked by Jesus attest that the Father has sent him. They invite belief in him. ²⁶⁹ To those who turn to him in faith, he grants what they ask. ²⁷⁰ So miracles strengthen faith in the One who does his Father's works; they bear witness that he is the Son of God. ²⁷¹ But his miracles can also be occasions for "offence"; ²⁷² they are not intended to satisfy people's curiosity or desire for magic Despite his evident miracles some people reject Jesus; he is even accused of acting by the power of demons. ²⁷³

549 By freeing some individuals from the earthly evils of hunger, injustice, illness and death, ²⁷⁴ Jesus performed messianic signs. Nevertheless he did not come to abolish all evils here below, ²⁷⁵ but to free men from the gravest slavery, sin, which thwarts them in their vocation as God's sons and causes all forms of human bondage. ²⁷⁶

550 The coming of God's kingdom means the defeat of Satan's: "If it is by the Spirit of God that I cast out demons, then the kingdom of God has come upon you." ²⁷⁷ Jesus' exorcisms free some individuals from the domination of demons. They anticipate Jesus' great victory over "the ruler of this world". ²⁷⁸ The kingdom of God will be definitively established through Christ's cross: "God reigned from the wood." ²⁷⁹