Robin Hobb said this quote
“ What is a secret? It is much more than knowledge shared with only a few, or perhaps only one another. It is power. It is a bond. It is a sign of deep trust, or the darkest threat possible. There is power in the keeping of a secret, and power in the revelation of a secret. Sometimes it takes a very wise man to discern which is the path to greater power. All men desirous of power should become collectors of secrets. There is no secret too small to be valuable. All men value their own secrets far above those of others. A scullery maid may be willing to betray a prince before allowing the name of her secret lover to be told. ”