Ignore the memory of an object and fix attention on the original experience which was the basis of the memory. Look at an object, withdraw it, slowly eliminate the knowledge of the object together with the thought and impressions. Intuition emerging from intensity of devotion. When one object is perceived, all other objects become empty. Concentrate on that emptiness.
Mental purity arises above variations in association of thought.
Bhairava appears in the I-consciousness. Develop Sama towards all. Sama means equipoise. See Ecstasy on this site. Reject both repulsion and attachment, cleave to Sama.