St. Seraphim of Sarov: Acquire the spirit of peacde

 My joy, acquire the spirit of peace and then the souls of thousands around you will be saved.

+St. Seraphim of Sarov, from The Synaxarion, Volume 3, in his entry for January 2nd.

St. Basil the Great: On the blessings of the Holy Spirit

 Through the Holy Spirit comes our restoration to Paradise, our ascension into the Kingdom of heaven, our return to divine adoption, our courage to call God our Father, our being made partakers of the grace of Christ, our being called children of light, our sharing in eternal glory, and in a word, our being brought into a state of all "fullness of blessing" (Rom 15:29), both in this world and in the world to come.

St. Basil the Great, from On the Holy Spirit, 15,36

St. Irenaeus of Lyons: On the Church and the Holy Spirit

 Having received this preaching and this faith, as I have said, the Church although scattered throughout the whole world, carefully preserves it, as if living in one house. She believes these things [everywhere] alike, as if she had but one heart and one soul, and preaches them harmoniously, teaches them and hands them down, as if she had but one mouth... Neither will one of those who preside in the churches who is very powerful in speech say anything different from these things, for no one is above [his] teacher, nor will one who is weak in speech diminish the tradition...

We preserve the teaching we have received from the Church, like a precious trust contained within and excellent vessel. The Spirit is ever rejuvenating it and imparting this rejuvenation to the Church in which it is contained. It is the gift of God entrusted to the Church. It imparts the Spirit to God's creatures, all who participate in it are enlivened and that is their communion in Christ, that is the Holy Spirit, the promise of incorruptibility, the foundation of our faith and the ladder that allows us to mount up to God.

+St. Irenaeus of Lyons, from Against Heresies, Book 1 20.2 and Book 3 24.1

Akathist: Prayer to the All-holy Spirit

Prayer to the All-holy Spirit

O Holy Spirit, Who fillest the whole universe with Thyself and givest life unto all, and Who withdrawest from defiled men, I humbly entreat Thee: Disdain not the impurity of my soul, but come and make Thine abode within me, and cleanse me of all the defilement of sin; that with Thy help I may live out the remaining time of my life in repentance and the doing of good works, and thus may glorify Thee with the Father and the Son, unto the ages of ages. Amen.

From the Akathist to the All-Holy and Life-Creating Spirit, in Book of Akathists II, To Our Savior, the Mother of God, and Various Saints.