These things I have spoken to you, that in Me you may have peace. In the world you will have tribulation; but be of good cheer, I have overcome the world.
(John 16:33)

Whenever you are in anxiety or fear, then you have stepped out of the divine help and protection of God Almighty.  Whenever you set your eyes and heart on the Lord Jesus Christ in the face of adversity, the victorious power of God will go before you.  His peace is His glorious presence around you.  When you step out of His presence then you are out of His peace.  Philippines 4:6-7 states:

Be anxious for nothing, but in everything by prayer and supplication, with thanksgiving, let your requests be made known to God; and the peace of God, which surpasses all understanding, will guard your hearts and minds through Christ Jesus.

The greatest way to live in the Lord’s peace is to live a lifestyle of praying in the Spirit and keeping your heart and eyes on Him in constant fellowship.  Prayer and fellowship with the Lord Jesus Christ will always give you the peace of God Almighty in all circumstances.  Wherever you go people will say they feel a wonderful peaceful presence around you.

You will show me the path of life; In Your presence is fullness of joy; At Your right hand are pleasures forevermore.
(Psalm 16:11)
For where envy and self-seeking exist, confusion and every evil thing are there. But the wisdom that is from above is first pure, then peaceable, gentle, willing to yield, full of mercy and good fruits, without partiality and without hypocrisy.
(James 3:16 -17)
Because you have made the LORD, who is my refuge, Even the Most High, your dwelling place
(Psalm 91:9)