5487. 'To fill their vessels with grain' means that factual knowledge was endowed with good produced from truth. This is clear from the meaning of 'filling', because this was done freely, as being endowed with; from the meaning of 'vessels' as factual knowledge, dealt with in 3068, 3079; and from the meaning of 'grain' as good produced from truth, which is the good of truth, dealt with in 5295.