The agate is one of the oldest stones in recorded history. Agates attract strength. Agate is a protection from bad dreams. It also protects from stress and energy drains. The agate can't change emotions, but helps to change our level of acceptance of the emotion. Such as when you are very sad the agate will let you know that this will pass and help you get on to another and better day. This is why the Agate is considered so powerful as it gives us the strength to carry on.