"As the Lord has formed us of two elements--the spiritual and the material, of a reasonable soul and a material body requiring material support, the Devil, in spite of God and ourselves, endeavours by every means to take advantage of this very duality of our nature, by inclining us to put our trust, not in God, but in carnal things, and tempting us, through the flesh, to every sin: to gluttony, fornication and every impurity; to covetousness, envy, slothfulness, theft, avarice, hatred, murder Thus, for instance, he incites us, he makes us trust, not in God, but in money, food and drink, human ties and connections, ranks, honours and privileges, nobility of birth, intellect, education, books; he incites us to find pleasure in food, drink, dress, in concerts of worldly music, theatres, joking, idle-speaking, and in the play of words. But the true servant of God trusts in his Lord, always and in everything, in the common Father and Provider of all, Who worketh all things in all, remembering what has been said: "Casting all your care upon Him; for He careth for you." (1 Peter 5:7). As soon as disturbance and violence arise in your soul, recognise in this the influence of Satan, and immediately set against him the Rock--Christ. Satan will break his teeth against that Rock, and shall not reach you. But also bear in mind that you must love everyone as yourself."
- Saint John of Kronstadt