1Jn 4:9-21 (King James)

⁹ In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him.
¹⁰ Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.
¹¹ Beloved, if God so loved us, we ought also to love one another.
¹² No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.
¹³ Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit.
¹⁴ And we have seen and do testify that the Father sent the Son to be the Saviour of the world.
¹⁵ Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
¹⁶ And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.
¹⁷ Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world.
¹⁸ There is no fear in love; but perfect love casteth out fear: because fear hath torment. He that feareth is not made perfect in love.
¹⁹ We love him, because he first loved us.
²⁰ If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?
²¹ And this commandment have we from him, That he who loveth God love his brother also.

1Jn 4:9-21 (Vulgate)

⁹ In hoc apparuit caritas Dei in nobis, quoniam Filium suum unigenitum misit Deus in mundum, ut vivamus per eum.
¹⁰ In hoc est caritas : non quasi nos dilexerimus Deum, sed quoniam ipse prior dilexit nos, et misit Filium suum propitiationem pro peccatis nostris.
¹¹ Carissimi, si sic Deus dilexit nos : et nos debemus alterutrum diligere.
¹² Deum nemo vidit umquam. Si diligamus invicem, Deus in nobis manet, et caritas ejus in nobis perfecta est.
¹³ In hoc cognoscimus quoniam in eo manemus, et ipse in nobis : quoniam de Spiritu suo dedit nobis.
¹⁴ Et nos vidimus, et testificamur quoniam Pater misit Filium suum Salvatorem mundi.
¹⁵ Quisquis confessus fuerit quoniam Jesus est Filius Dei, Deus in eo manet, et ipse in Deo.
¹⁶ Et nos cognovimus, et credidimus caritati, quam habet Deus in nobis. Deus caritas est : et qui manet in caritate, in Deo manet, et Deus in eo.
¹⁷ In hoc perfecta est caritas Dei nobiscum, ut fiduciam habeamus in die judicii : quia sicut ille est, et nos sumus in hoc mundo.
¹⁸ Timor non est in caritate : sed perfecta caritas foras mittit timorem, quoniam timor pœnam habet : qui autem timet, non est perfectus in caritate.
¹⁹ Nos ergo diligamus Deum, quoniam Deus prior dilexit nos.
²⁰ Si quis dixerit : Quoniam diligo Deum, et fratrem suum oderit, mendax est. Qui enim non diligit fratrem suum quem vidit, Deum, quem non vidit, quomodo potest diligere ?
²¹ Et hoc mandatum habemus a Deo : ut qui diligit Deum, diligat et fratrem suum.