The Importance of Mental Tranquility

The divine life, which in every stage of its existence depends upon the presence of the Spirit of God, places a high estimate on mental tranquility. It is no new thing to remark that the Holy Spirit has no congeniality with, and no pleasure in the soul, where strife and clamor have taken possession. If, therefore, we would have the Holy Spirit with us always, we must avoid and flee, with all the intensity of our being, all inordinate coveting, all envying, malice, and evil speaking, all impatience, jealousy, and anger. Of such a heart, and such only, which is calm as well as pure, partaking something of the self-collected and sublime tranquility of the divine mind, can it be said, in the truest and highest sense that it is  a TEMPLE FITTED FOR THE INDWELLING  OF  THE HOLY GHOST.

— Religious Maxims (1846) XL.