I had to disagree with your comment for this part alone, "If you say, "if it be your will...", in prayer to God, then again, you have no faith for whatever you prayed for",
this is nonsense brother, it really is. Are you saying that our Lord Jesus didn't have faith in His example to us in Mat. 26:38-39?
38 Then He said to them, “My soul is consumed with sorrow to the point of death. Stay here and keep watch with Me.” 39 Going a little farther, He fell facedown and prayed, “My Father, if it is possible, let this cup pass from Me. Yet not as I will, but as You will.”
I want to be in my Fathers will, His will be done, not mine. I am ONLY here for His glory, not the other way around. I think the rest of what you said was pretty sound, but this "don't pray His will, it shows you don't have faith in what you're praying for" is dangerous falsehood. I will pray "if it be Your will", because I trust God to know whats better for me more than I trust myself. That thinking is too "man centered", when we need to be God centered.
It's not nonsense if you know what faith is and how it works.
The difference between your pray and Jesus' is, He KNEW what the will of the Father was, you don't.
Jesus didn't ask the Father what His will was, He knew what was written of Him, and what He was sent to do.
You, on the other hand, are being like doubting Thomas. You are moved by what you see, feel, and experience, and use the outcome or end results to dictate what the will of the Father was or is.
For example, let's say you pray for yourself of a loved one for healing.
Since you don't know what the will of God is concerning your prayer for a specific request, you pray saying, "if it be you will Father, would you heal so and so?"
And from there, you use the end result, usually within a day or two, to determine what God's will is.
If the person gets better, then it was God's will for them to be healed, and if they get worse, then it wasn't.
Tell me if you can,
where do you see any faith in all that nonsense?
The only thing you are doing is HOPING God will heal so and so, WISHING He grant you your request, but still WONDERING what He will do, because you
don't know what His will is and because you don't believe some things written in the bible. You say you believe, but like most, you don't really.
God promises to heal
THE BELIEVERS, NOT THE DOUBTERS.
Do you know what faith is and how it works?
What's the difference between hoping and biblical believing?
We all know God CAN do what we ask for, the big question is, not only WILL HE, but do we know He will?
To answer my questions above, hope thinks it will happen sometime in the future, where believing thinks it's done NOW, as in, present tense.
What is faith and how does it work?
In a nutshell, faith IS the very thing you desire.
And it works by acting on what you believe in your heart.
Romans 10:8-10 tells you how it works.
You either say what you believe and/or act on what you believe.
If you don't know what the will of your Father is, you cannot have any confidence or assurance He will grant your request. You will not be "fully persuaded" God will do anything, because you either don't know the promises of His word, and/or you don't believe them.
You also most likely don't believe you have anything to do with the outcome of your request or prayer to God, so in your eyes, there is no such thing as to whether faith works or not, it's all up to God. Right?
The truth is, faith works irrespective of what God's will is for us.
I'm not advocating bypassing God's will.
We should pray IN LINE with God's will
BY PRAYING ACCORDING TO HIS WORD.
If you know what He said, and believe that, then you can pray according to God's will and not just your own.
What did you do to get saved?
Did you ask God, "if it be your will, would you save me, if I receive Jesus as my personal lord and savior?"
If you read the word of God and believe what is written as truth, then you won't wonder what God's will is, you will KNOW. You won't HOPE God saves you, you KNOW He will.
What if you didn't know, would God still save you?
No, because you didn't act on it in faith.
You have to know what the will of God is and what He said, in order for you to have any faith in God to fulfill His promise.