He Deemed it Finished so that We May Continue in His Beginning

“Then King David went in and sat before the LORD, and he said:

‘Who am I, LORD God, and what is my family, that you have brought me this far? (1 Chronicles 17:16; also in 2 Samuel 7:18) 

The singular reason I can and do claim this benediction—in truthful, overwhelming thankfulness—is because of Jesus’ atoning sacrifice, His ascension to the right hand of God where He continually intercedes, His Word and His Holy Spirit. 
In tender, pondering awe I quietly cherish and "see what great love the Father has lavished on us, that we should be called children of God! And that is what we are!" (1 John 3:a). 

“…Jesus said, ‘It is finished.’” John 19:30 (in part)

“If you then, though you are evil, know how to give good gifts to your children, how much more will your Father in heaven give the Holy Spirit to those who ask Him?” Luke 11:13

"His divine power has given us everything we need for a godly life through our knowledge of him who called us by his own glory and goodness. Through these he has given us his very great and precious promises, so that through them you may participate in the divine nature, having escaped the corruption in the world caused by evil desires.
For this very reason, make every effort to add to your faith goodness; and to goodness, knowledge; and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; and to godliness, mutual affection; and to mutual affection, love. For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. But whoever does not have them is nearsighted and blind, forgetting that they have been cleansed from their past sins.
Therefore, my brothers and sisters, make every effort to confirm your calling and election. For if you do these things, you will never stumble, and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ." 

2 Peter 1:3-11