5710. 'And drank plentifully' means in abundance. This is clear from the meaning of 'drinking' as applying truths beneath good, dealt with immediately above in 5709; therefore 'drinking plentifully' means an application of truths in abundance.
From the explanations given in this chapter it is evident that the subject has been an introductory stage to the joining of the natural to the celestial of the spiritual. But the subject in the next chapter is the first stage when they are actually joined together, that first stage being represented by Joseph's revelation of himself to his brothers, and the second stage by his going to meet his father and his brothers and bringing them down into Egypt.