God has abundant grace and peace, for every born again Christian, but there is something a Christian has to do, in order to have them abundantly.
God does not just load us with his grace and peace, regardless of what we think or do.
That is why, In 2 Peter 1:2, it says that we can have the abundant grace and peace from God, if we have knowledge of God. That is, if we know God personally, and have both, knowing God, and knowing about God.
You see, it is not enough for us to only know about God, or only to know God in a personal relationship. We need both.
If we emphasise only having personal relationship with God, but not knowing about God, then we will have zeal for God, but without enough knowledge. Ofcourse, we can never have enough knowledge about God, but we can have more knowledge about him.
For example, studying Theology, can help us know more about God. But experiencing God’s presence and love personally, in our relationship with him, is knowing God personally, and in a closer way, even if we do not know too much about God.
God has lavished on us his grace and peace abundantly, because of what Jesus did for us on the cross, and because of his resurrection, but we are the ones, who have to receive them with faith, just as we have received our salvation by faith. Salvation is given by the grace of God, to everyone who believes, but everyone has to receive it by grace, or otherwise, they will never be saved.
So, I believe that it is the reason, why Apostle Peter says in 2 Peter 1:2, that we have the grace and peace of God, by our knowledge of him. The NLT New Living Translation actually says that we will have the grace and peace of God, as we grow in our knowledge of God. The more we know God, and about God, the more can we receive his grace and peace in abundance.