Arcana Coelestia # 3032
3032. 'Abraham said to him' means the Lord's perception coming from the Divine. This is clear from the meaning of 'saying' as perceiving, dealt with above in 3029, and from the representation of 'Abraham' as the Lord as regards the Divine Human, from which that perception came.
Bless
The Lord in essence is perfect love expressed as perfect wisdom. He created us so that He could love us, give us love and wisdom of our own, and thus be united with us. This is the ultimate blessing, for us to receive His love and wisdom and to be together with Him, and all other forms and meanings of "blessing" flow from it. This flow, however, takes many different forms in the Bible. When people receive the Lord's blessing, it illustrates how His love and wisdom flow into us in forms that fit the spiritual state people represent in the Word. When people bless the Lord, it indicates an acknowledgment that life and all its gifts come from Him and shows a desire to accept them and be conjoined. When people bless each other, it represents the desire to share good desires and true ideas as much as possible.