And I will bless you and you shall be a blessing and in you all the families of the earth shall be blessed (Genesis 12:2, 3).
We cannot be a blessing until we are first blessed ourselves. God first said, “I will bless you” before Abram could be a blessing to all the families of the earth. How does God bless us? Through the angels:
“Christ virtually says, On the bank of the Jordan the heavens were opened, and the Spirit descended like a dove upon Me. That scene was but a token that I am the Son of God. If you believe on Me as such, your faith shall be quickened. You shall see that the heavens are opened, and are never to be closed. I have opened them to you. The angels of God are ascending, bearing the prayers of the needy and distressed to the Father above, and descending, bringing blessing and hope, courage, help, and life, to the children of men.
“The angels of God are ever passing from earth to heaven, and from heaven to earth. The miracles of Christ for the afflicted and suffering were wrought by the power of God through the ministration of the angels. And it is through Christ, by the ministration of His heavenly messengers, that every blessing comes from God to us. In taking upon Himself humanity, our Saviour unites His interests with those of the fallen sons and daughters of Adam, while through His divinity He grasps the throne of God. And thus Christ is the medium of communication of men with God, and of God with men.” The Desire of Ages, 142
Once we are blessed, then we are to bless others.
“Our confession of His faithfulness is heaven’s chosen agency for revealing Christ to the world. We are to acknowledge His grace as made known through the holy men of old; but that which will be most effectual is the testimony of our own experience. We are witnesses for God as we reveal in ourselves the working of a power that is divine. Every individual has a life distinct from all others, and an experience differing essentially from theirs. God desires that our praise shall ascend to Him, marked by our own individuality. These precious acknowledgments to the praise of the glory of His grace, when supported by a Christ-like life, have an irresistible power that works for the salvation of souls.” Ibid., 347