2. Infidelity is a violation of the mutually agreed-upon rules or boundaries of an intimate relationship, which constitutes a significant breach of faith or a betrayal of core shared values with which the integrity of the relationship is defined.

4. In common use, it describes an act of unfaithfulness to one’s husband, wife, or lover, whether sexual or non-sexual in nature.

6. There are two areas in a close relationship where infidelity mostly occurs: physical intimacy and emotional intimacy.

8. Infidelity is not just about sex outside the relationship, but about trust, betrayal, lying and disloyalty.

10. Deceiving others. That is what the world calls a romance. -- Oscar Wilde

12. I don't want to sell myself short. You hurt your spouse, not so much by the infidelity, but by the negative feelings about yourself that you bring home. Michael Zaslow

14. “Physical infidelity is the signal, the notice given, that all fidelities are undermined.” Katherine Anne Porter

16. When love becomes laboured we welcome an act of infidelity towards ourselves to free us from fidelity. Janet Watson

18. Wives in their husbands absences grow subtler, and daughters sometimes run off with the butler. Lord Byron

20. Never tell a loved one of an infidelity: you would be badly rewarded for your troubles. Although one dislike being deceived, one likes even less to be undeceived. NinonDeLenclos

22. People who are so dreadfully "devoted" to their wives are so apt, from mere habit, to get devoted to other people's wives as well. Jane Welsh Carlyle

24. No adultery is bloodless. Natalia Ginzburg

26. “She suspected him of infidelity, with and without reason, morning, noon and night” AdaLeverson

28. Wise married women don't trouble themselves about infidelity in their husbands. Samuel Johnson

30. What constitutes an act of infidelity varies between and within cultures and depends also on the type of relationship that exists between people.

32. The sea - this truth must be confessed - has no generosity. No display of manly qualities - courage, hardihood, endurance, faithfulness – has ever been known to touch its irresponsible consciousness of power. Joseph Conrad

34. Love grows where trust is laid, and love dies where trust is betrayed."

36. "A new chair may look better, but the old one has already been moulded to fit your seat."

38. There are all kinds of ways of being unfaithful, not the worst of them with your body.

40. Health is the greatest gift, contentment the greatest wealth, faithfulness the best relationship. Buddha

42. I do not pray for success, I ask for faithfulness. Mother Teresa

44. Marriage has a unique place because it speaks of an absolute faithfulness, a covenant between radically different persons, male and female; and so it echoes the absolute covenant of God with his chosen, a covenant between radically different partners. Rowan D. Williams

46. Nothing is more noble, nothing more venerable than fidelity. Faithfulness and truth are the most sacred excellences and endowments of the human mind. Marcus Tullius Cicero

48. There's no trust, no faith, no honesty, in men; all perjured, all forsworn, all nought, all dissemblers. - William Shakespeare, Romeo and Juliet

50. Your faithfulness makes you trustworthy to God. Edwin Louis Cole

52. Confidentiality is a virtue of the loyal, as loyalty is the virtue of faithfulness. Edwin Louis Cole

54. A realist, in Venice, would become a romantic by mere faithfulness to what he saw before him. Arthur Symons

56. It is better to be faithful than famous. Theodore Roosevelt

58. Hold faithfulness and sincerity as first principles. Confucius

60. I would rather err on the side of faith than on the side of doubt. - Robert Schuller

62. The reason why women grown bad are worse than men is because it is the best that turns to the worst. - Alexandre Dumas

64. All the time spent idly, is spent wickedly, and is unfaithfulness to our masters. Jupiter Hammon

66. When a man must force himself to be faithful in his love, this is hardly better than unfaithfulness. Francois de La Rochefoucauld

68. In an age when the fashion is to be in love with yourself, confessing to be in love with somebody else is an admission of unfaithfulness to one's beloved. Russell Baker

70. Trinity October 2009 http://www.slideshare.net/trinityblu