The essence of mind is empty. It is synonymous with true nature and is the natural default human condition. What we generally call mind is actually the content—thoughts, emotions, sensory objects. Whether these things are present or not, essential mind remains untouched and unmoved. We are taught to value the content of mind, not the essence. This is why there is suffering and confusion. The content is in constant change and flux, birth and decay, so there can be no security or stability in valuing that. The true mental and emotional stability is already attained and is found by valuing the essence of mind, which is empty, free, clear and stable at all times already. Whatever the content is doing doesn't matter at all. Come to know the essence, empty mind. This is peace.