How is the Catholic community strengthened by the Holy Spirit?

Answer 1

Our Blessed Lord sent the Holy Spirit upon the Catholic Church at Pentecost, and sends the Holy Spirit on each believer both at Baptism and most especially at Confirmation. The gifts and fruits of the Holy Spirit are:

from The Catechism of the Catholic Church, second edition, English translation 1994

III. The Gifts and Fruits of the Holy Spirit

1830. The moral life of Christians is sustained by the gifts of the Holy Spirit. These are permanent dispositions which make man docile in following the promptings of the Holy Spirit.

1831. The seven gifts of the Holy Spirit are wisdom, understanding, counsel, fortitude, knowledge, piety, and fear of the Lord. They belong in their fullness to Christ, Son of David. (Cf. Isa 11:1-2) They complete and perfect the virtues of those who receive them. They make the faithful docile in readily obeying divine inspirations.

Let your good spirit lead me on a level path. (Ps.143:10)

For all who are led by the Spirit of God are sons of God . . . If children, then heirs, heirs of God and fellow heirs with Christ. (Rom 8:14, 17).

from Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980

Fruits of the Holy Spirit. Supernatural works that, according to St. Paul, manifest the presence of the Holy Spirit. The one who performs them recognizes God's presence by the happiness he experiences, and other the divine presence by witnessing these good works (Galatians 5:22-23). They are, in other words, identifiable effects of the Holy Spirit. In the Vulgate text they are: charity, joy, peace, patience, benignity, goodness, longanimity, mildness, faith, modesty, continency, and chastity.