People say all the time: "Secrets don't make friends." Strategically however, most of the time, the opposite is true. This is because of Personal Relationships with people, that usually, in order to have the trust others, and gain competitive knowledge, you must be able to keep a secret or two. Overall, the more you know, the more power you have... not just in your own knowledge, but in having the freedom to choose whether to share information or not and how.