1 John 5:13–15 Assurance of salvation and answered prayers.

One of the evidence of salvation (this is a promise) is that if we (i.e. believers) ask anything according to His will, He hears us and we will receive the requests that we asked from him.
 
13 These things I have written to you who believe in the name of the Son of God, in order that you may know that you have eternal life. 14 And this is the confidence that we have before him: that if we ask anything according to his will, he hears us. 15 And if we know that he hears us in whatever we ask, we know that we have the requests that we have asked from him.
1 John 5:13–15

Predestination and Miracles

Predestination and Miracles

This is an excellent article by Vincent Cheung on the link between predestination and miracles. *Recommended reading. (Click on this link for the article)

Brief summary:
John 15:16–17
16 You did not choose me, but I chose you and appointed you that you should go and bear fruit, and your fruit should remain, in order that whatever you ask the Father in my name he will give you. 17 These things I command you: that you love one another.

Cheung explains that predestination is for more than just bare salvation. It also includes a whole package of blessings and responsibilities. God has chosen us, and predestined us to bear fruit that will last. The Father will give us whatever we ask in his name.” By giving us whatever we ask of him, the Son brings glory to the Father. In so doing, we bear fruit and show that we are his disciples. Christians are commanded (not requested) to ask the Father for ‘whatever’ so that the Father can answer it. This is also how we show that we love one another. And by obeying God’s commandments, we also show that we love God. When something is repeated so many times in Scripture we need to pay special attention.

1) Predestination means that we are…
2) Predestined to bear fruit that will last.
3) God commands us to ask him for “whatever”
4) And God promises to give us whatever we ask of him
5) God is glorified by answering our prayers
6) This is how we bear fruit and show that we are his disciples.
7) And this is how we show that we love one another and love God.

This summary does not really do justice to Cheung’s article, so I would highly encourage you to read what he has written in its entirety.