In the Old Testament, “peace” carries the fundamental meaning of welfare, prosperity, or wholeness as well as the absence of hostility
Numbers 6:22–26 CSB
22The Lord spoke to Moses: 23“Tell Aaron and his sons, ‘This is how you are to bless the Israelites. You should say to them, 24“May the Lord bless you and protect you; 25may the Lord make his face shine on you and be gracious to you; 26may the Lord look with favor on you and give you peace.” ’
the priestly blessing
Isaiah 9:6 CSB
6For a child will be born for us, a son will be given to us, and the government will be on his shoulders. He will be named Wonderful Counselor, Mighty God, Eternal Father, Prince of Peace.
Romans 3:23–24 CSB
23For all have sinned and fall short of the glory of God; 24they are justified freely by his grace through the redemption that is in Christ Jesus.
Romans 5:1–2 CSB
1Therefore, since we have been justified by faith, we have peace with God through our Lord Jesus Christ. 2We have also obtained access through him by faith into this grace in which we stand, and we boast in the hope of the glory of God.
Grace and Peace to you is how Paul started most of his letters.
John 14:25–27 CSB
25“I have spoken these things to you while I remain with you. 26But the Counselor, the Holy Spirit, whom the Father will send in my name, will teach you all things and remind you of everything I have told you. 27“Peace I leave with you. My peace I give to you. I do not give to you as the world gives. Don’t let your heart be troubled or fearful.
Ephesians 4:2–3 CSB
2with all humility and gentleness, with patience, bearing with one another in love, 3making every effort to keep the unity of the Spirit through the bond of peace.
Galatians 5:22–23 CSB
22But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, 23gentleness, and self-control. The law is not against such things.
Philippians 4:4–7 CSB
4Rejoice in the Lord always. I will say it again: Rejoice! 5Let your graciousness be known to everyone. The Lord is near. 6Don’t worry about anything, but in everything, through prayer and petition with thanksgiving, present your requests to God. 7And the peace of God, which surpasses all understanding, will guard your hearts and minds in Christ Jesus.
peaceful doesn’t mean “easy.” Jesus never promised easy; He only promised help. In fact, He told us to expect tribulation