Just saying the word Tranquility makes you feel at peace.
Serenity, peace, soothing, stillness, is other words that if you say them over and over, gives you peace. In this fast pace world we need peace.
Christians peace comes from the Lord.
Numbers 6:24 The Lord bless thee, and keep thee:
Numbers 6:25 The Lord make his face shine upon thee, and be gracious unto thee:
Numbers 6:26 The Lord lift up his countenance upon thee, and give thee peace.
2 Thessalonians 3:16 Now the Lord of peace himself give you peace always by all means.
Isaiah 26:3 Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.
1 Peter 5:7 Casting all your care upon him; for he careth for you.
1Peter 3:11 Let him eschew evil, and do good; let him seek peace, and ensue it.
Hebrew 12:4 Follow peace with all men, and holiness, without which no man shall see the Lord: