LOVE 1 Peter 1:22

Now that you have purified yourselves by obeying the truth so that you have sincere love for each other, love one another deeply, from the heart.

Now that you have purified yourselves
James 4:8 Come near to God and he will come near to you. Wash your hands, you sinners, and purify your hearts, you double-minded.

by obeying the truth
1 Peter 1:2 ... who have been chosen according to the foreknowledge of God the Father, through the sanctifying work of the Spirit, to be obedient to Jesus Christ and sprinkled by his blood: Grace and peace be yours in abundance.
1 Peter 1:14 As obedient children, do not conform to the evil desires you had when you lived in ignorance.

love one another deeply, from the heart
John 13:34 "An new command I give you: Love one another. As I have loved you, so you must love one another."
Romans 12:10 Be devoted to one another in love. Honor one another above yourselves.
1 Thessalonians 4:9-10 Now about your love for one another we do not need to write to you, for you yourselves have been taught by God to love each other. And in fact, you do love all of God's family throughout Macedonia. Yet we urge you, brothers and sisters, to do so more and more.
Matthew 5:43-44 "You have heard that it was said, 'Love your neighbor and hate your enemy.' But I tell you, love your enemies and pray for those who persecute you, ..."
James 2:8 If you really keep the royal law found in Scripture, "Love your neighbor as yourself," you are doing right.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.™ Used by permission. All rights reserved worldwide.