एवमात्मारणौ ध्यानमथने सततं कृते ।उदितावगतिर्ज्वाला सर्वाज्ञानेन्धनं दहेत् ॥ ४२ ॥
In plain words
So: the Self is the block of wood, meditation is the drilling. Keep at it without a break. Knowledge flares up like flame — and every last stick of ignorance is its fuel.
Close to the Sanskrit
Thus, in the Self as the fire-drill block, when the churning that is meditation has been done continuously, the arisen flame that is knowledge would burn all the fuel of ignorance.