Matthew 17:19 Then came the disciples to Jesus apart, and said, Why could not we cast him out? 20 And Jesus said unto them, Because of your unbelief: for verily I say unto you, If you have faith as a grain of mustard seed, you shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.
[2] One system is based upon infinite possibilities while the other system is straddled with limitations. As a general rule, persons would often petition God in harmony with what their perception of His ability is. If their perspective is that God could only do so much and no more, then, their prayers would be in sync with that perspective.
[The Desire Of Ages pp 292] When the five thousand were fed, Philip's lack of faith was shown. It was to test him that Jesus questioned, “Whence shall we buy bread, that these may eat?” Philip's answer was on the side of unbelief: “Two hundred pennyworth of bread is not sufficient for them, that every one of them may take a little.” John 6:5, 7. Jesus was grieved. Although Philip had seen His works and felt His power, yet he had not faith.
However, if their perspective is that God could do anything, including the seemingly impossible, then their prayers and petitions would reflect what they believe and will most likely be open-ended, with the person not considering any restrictions on the part of God. This sacred truth is reflected in the following verses.
Matthew 9: 28 And when he was come into the house, the blind men came to him: and Jesus saith unto them, Believe ye that I am able to do this? They said unto him, Yea, Lord. 29 Then touched he their eyes, saying, According to your faith be it unto you.
May The Lord add His blessing to the study of His word. God bless!