Sorry, but your focus is completely on what Christ is doing, but you ignore what man must do.
"In Him we also have obtained an inheritance, having been predestined according to the purpose of Him who works all things in accordance with the plan of His will, 12 to the end that we who were the first to hope in the Christ would be to the praise of His glory. 13 In Him, you also, after listening to the message of truth, the gospel of your salvation—having also believed, you were sealed in Him with the Holy Spirit of the promise, 14 who is a first installment of our inheritance, in regard to the redemption of God’s own possession, to the praise of His glory."
This hearkens us back to Rom 10:12-17 which says that faith (our actions and response) comes through hearing the Word of God (the Gospel). And you can clearly see that Paul is equating belief with faith and obedience in verse 16.
As for 1 Pet 1:2, consider also 2 Pet 1:4-11.
"Through these He has granted to us His precious and magnificent promises, so that by them you may become partakers of the divine nature, having escaped the corruption that is in the world on account of lust. 5 Now for this very reason also, applying all diligence, in your faith supply moral excellence, and in your moral excellence, knowledge, 6 and in your knowledge, self-control, and in your self-control, perseverance, and in your perseverance, godliness, 7 and in your godliness, brotherly kindness, and in your brotherly kindness, love. 8 For if these qualities are yours and are increasing, they do not make you useless nor unproductive in the true knowledge of our Lord Jesus Christ. 9 For the one who lacks these qualities is blind or short-sighted, having forgotten his purification from his former sins. 10 Therefore, brothers and sisters, be all the more diligent to make certain about His calling and choice of you; for as long as you practice these things, you will never stumble; 11 for in this way the entrance into the eternal kingdom of our Lord and Savior Jesus Christ will be abundantly supplied to you."
Notice here that if we do not continue to practice the things listed here we can lose our salvation, because our calling and election would have then been in vain. It is not that obedience is God's gift to us, rather our obedience is our response to God's greatness and mercy: that we would obey Him because He first gave Himself for us.