'A spring from which they drink' means by it, in a manner of mixing from it. 'The close ones' refers to those whose closeness has resulted from their attraction to the truth and their aspirations being focused solely on it. Every drink they desire is for them. As for the righteous, they do not drink from it except the pure wine. As for others, they do not reach it at all. Some say that the close ones drink from this spring purely, while the righteous have it mixed for them, and the difference is clear - may it be delightful for them.