Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 4
Fragment ID: 13034
It [a flame in the heart as big as a man’s thumb] is the psychic fire kindled in the heart. The psychic being in the heart is described by the Upanishads as of the size of a thumb, aṅguṣṭha-mātraḥ puruṣo’ntarātmā – it may manifest first as this psychic flame.