Adi Shankaracharya wrote about the cool breeze of Saundarya Lahari and Chaitanya Lahari, which he called 'the waves of beauty' and 'the waves of Chaitanya'. Chaitanya is the vital, Divine Force, and those who emit cool vibrations are realised-souls. Some people are born-realised but may still be possessed by their ego. In Sahaj Yoga, after Realisation, one knows all the techniques of the Divine Force and can protect, improve, and cure oneself and others.