Purification here means looking at our past unskillful actions which have created seeds of negative karma in our minds, and using visualisation and mantra recitation to remove those seeds in a healthy and productive way. Vajrasattva is the embodiment of all the Buddha’s cleaning and purifying energy. We all make mistakes, and how we deal with them is key to making spiritual progress. We’ll be using a short text composed by Lama Zopa Rinpoche