Matthew 21:21-22
So Jesus answered and said to them, “Assuredly, I say to you, if you have faith and do not doubt, you will not only do what was done to the fig tree, but also if you say to this mountain, ‘Be removed and be cast into the sea,’ it will be done. And whatever things you ask in prayer, believing, you will receive.”

I remember reading this scripture as a new Christian still in high school and I thought I’d give it a try and I attempted to “test” it out. I did so foolishly and selfishly.
Of course, I did not move mountains.
I was angry and actually told one of my friends that the Bible is a book of lies.
My problem is the problem faced by many that feel let down by prayer – I wasn’t praying in the will of God. Remember, I was praying foolishly and selfishly.
Jesus said, “And whatever you ask in My name, that I will do, that the Father may be glorified in the Son. If you ask anything in My name, I will do it.” John 14:13-14
Two things here – glorifying God and asking in Jesus’ name.
My prayer was for me, not God. And praying in Jesus’ name is not a magical formula used on a whim. It is a lifestyle that parallels and agrees with the Savior.
For example, if you try to do something in my name, like buy a bottle of whiskey, anyone that truly knows me also knows I don’t buy nor drink. Your request is outside my nature.
So to pray in Jesus’ name is to pray within His nature.
1 John 5:14-15 says, “Now this is the confidence that we have in Him, that if we ask anything according to His will, He hears us. And if we know that He hears us, whatever we ask, we know that we have the petitions that we have asked of Him.”
Again prayer is according to His will for your life.