John 13:35 says to us “By this everyone will know that you are my disciples, if you love one another.”

And “beloved, let us love one another, for love is from God; and everyone who loves is born of God, and knows God. The one who does not love does not know God, for God is love.

But God demonstrates His own love for us in this: While we were still sinners, Christ died for us. Romans 5:8

There is no fear in love; but perfect love casts out fear, because fear involves punishment, and the one who fears is not perfected in love.