The four types of liberation

When can we really say that we have entered the door, that we started practicing the secret Vajrayana? When we are clear about the four types of liberation. And what are these four types of liberation? In meditative concentration, there is liberation through [naked] bare attention, liberation as soon as it arises, self-liberation and primordial liberation. One liberates the random thoughts, the afflictive emotions. It’s not necessarily that we completely realize this, but we are very clear about this reason. Only then we have entered into the secret Vajrayana.