The concept of balance is that both parties must be absolutely sure that the situation is beneficial to them. Any agreement is possible only if both parties are sure that they benefit from it... except when negotiations are conducted from a position of strength.
Remember this: truth is a whole. A piece of the whole is not truth but lie. This is why either you honor 100% of your promises and commitments or nothing else matters. An attempt at honoring half of your promise is rarely a good idea.
To gain control over a person, the leader can negotiate with his sins and vices, reaching an agreement that they force the person to work hard and obey, and in return they will be given freedom and support.
Face-to-face meeting works better than any other means of negotiation because information is transmitted through different channels. The brain, receiving information through various channels, pays more attention to it and trusts it.
When you go to a negotiation and want something, you are automatically afraid, and it spoils everything. And you get rid of the desire to take something... You go ahead, you brag, you present yourself, not wanting anything in return.
Equality of people in that Must, Want, Need... as well as Faith and Hope and Love must be directed inward. In this respect, people are equal. The whole relationship outside is a relationship of equal people, based on mutual exchange and mutual respect.