Salvation is possible because of God's power in salvation. But that hardly means you don't have to secure that power through faith by your believing.
Even the faith to secure God's power in salvation is not of you, but that hardly means you do not then have to place your trust in Christ in response to the gift of faith. We know who has received that faith, not rejected it, and who are trusting God through that faith by if they are living for Jesus. Generally speaking, if they are still living in their old lives then we know they do not trust God for salvation.
We must continue to trust God through the gift of the power of faith to be saved when Jesus comes back. We know we are doing that and are ready to meet him at his coming by if we are living for him.
Even the faith to secure God's power in salvation is not of you, but that hardly means you do not then have to place your trust in Christ in response to the gift of faith. We know who has received that faith, not rejected it, and who are trusting God through that faith by if they are living for Jesus. Generally speaking, if they are still living in their old lives then we know they do not trust God for salvation.
We must continue to trust God through the gift of the power of faith to be saved when Jesus comes back. We know we are doing that and are ready to meet him at his coming by if we are living for him.