Well peace, a fruit of the Holy Spirit, is beyond ourselves - it involves duties and our responsiblity to them, such as the virtue of justice: “the peace of all things lies in the tranquility of order; and order is the disposition of equal and unequal things in such a way as to give to each its proper place” (S. Augustine, City of God; XIX.13) This requires an intellect, our response to the First mind, Who wisely sets the proper goods to avail for the good of the Kingdom. “To love is to will the good of another.” (CCC 1766). Augustine says “wisdom is the charity of God” (Letter 120) and Thomas Aquinas replied to that in his Summa: “Augustine is speaking of wisdom as to its cause, whence also wisdom [sapientia] takes its name, in so far as it denotes a certain sweetness [saporem].” (STh II-II, q. 45, a. 2, rep. 1) And so, God out of his will to give us good things, gives us sweetness from crosses, and it is wisdom, his own charity for the salvation of soul.
Discipline is sweet when well-ordered and fervent. “Wisdom is the cross, and the cross is wisdom” (St. Louis de Montfort, Love of Eternal WIsdom, End of Ch. 14) “For the moment all discipline seems painful rather than pleasant; later it yields the peaceful fruit of righteousness to those who have been trained by it. Therefore lift your drooping hands and strengthen your weak knees, and make straight paths for your feet, so that what is lame may not be put out of joint but rather be healed.” (Heb 12:11-13) By sweetness of wisdom.
Silence provides an environment where are interior sheds off the toil of the sensual world and reaches out in poverty of spirit, begging for the sweetness it once had from the senses. And God fills the soul with good things inasmuch as the soul trusts in Him. “Who redeemeth thy life from destruction: who crowneth thee with mercy and compassion. Who satisfieth thy desire with good things: thy youth shall be renewed like the eagle’s.” (Ps 103:4-5, vulg.)