"Love is God. If you love God, God dwelleth in you, and you in God. Malice is the Devil. The instant you begin to feel malice against your neighbour, the Devil is in you, entering into you like a needle, and endeavouring to become a mountain within you, so greatly does he spread, and so heavy is he! And therefore continually love God and your neighbour. Do not admit malice into your heart, even for a single moment; consider it as an illusion of the Devil. Amen"
- Saint John of Kronstadt
Reference: http://www.archive.org/details/mylifeinchrist00sergiala