The word of the Lord is compared to a seed which is sown in a field; those who hear it with faith and are numbered among the little flock of Christ have truly received the kingdom. Then, by its own power, the seed sprouts and grows until the harvest. 252
Catechism number 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