It is God who chose us, who regenerated us, who gave us faith and trust in the One Savior, who bore the penalty of sin in our place, and who gave us the Holy Spirit so that we could understand and have the power to follow His Word.
Christ is a fully obedient, fully covenant-keeping mediator, and we are a covenant-keeping people in Christ.
He is worthy of our trust, he is ever present, and he became a priest and a sacrifice to sanctify the people of God in their place.