Fire, though present in the firesticks, is not perceived until one stick is rubbed against another. The Self is like that fire: it is realised in the body by meditation on the sacred syllable OM.
Let your body be the stick that is rubbed, the sacred syllable OM the stick that is rubbed against it. Thus shall you realise God, who is hidden within the body as fire is hidden within the wood.
Like oil in sesame seeds, butter in cream, water in the river bed, fire in tinder, the Self dwells within the soul. Realise him through truthfulness and meditation.