1 Beloved, believe not every spirit, but try the
  spirits whether they are of God: because many false
  prophets are gone out into the world.
  2 Hereby know ye the Spirit of God: Every spirit
  that confesseth that Jesus Christ is come in the
  flesh is of God:
  3 And every spirit that confesseth not that Jesus
  Christ is come in the flesh is not of God: and this
  is that spirit of antichrist, whereof ye have heard
  that it should come; and even now already is it in
  the world.
  4 Ye are of God, little children, and have overcome
  them: because greater is he that is in you, than he
  that is in the world.
  5 They are of the world: therefore speak they of the
  world, and the world heareth them.
  6 We are of God: he that knoweth God heareth us; he
  that is not of God heareth not us. Hereby know we the
  spirit of truth, and the spirit of error.
  7 Beloved, let us love one another: for love is of
  God; and every one that loveth is born of God, and
  knoweth God.
  8 He that loveth not knoweth not God; for God is
  love.
  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.

...to 1st John chapter 5