Personally, if I was doing five rakats a day and didn't even believe in God, it would make pretty much every human goodness and virtue an exercise in futility.
Does it matter that you believe in kindness to be kind?
Does it matter that you believe in charity to be charitable?
Here are several translations and notes, Mark 9.24
New International Version (©1984)
Immediately the boy's father exclaimed, "I do believe; help me overcome my unbelief!"
New Living Translation (©2007)
The father instantly cried out, "I do believe, but help me overcome my unbelief!"
English Standard Version (©2001)
Immediately the father of the child cried out and said, “I believe; help my unbelief!”
New American Standard Bible (©1995)
Immediately the boy's father cried out and said, "I do believe; help my unbelief."
International Standard Version (©2008)
With tears flowing, the child's father at once cried out, "I do believe! Help my unbelief!"
GOD'S WORD® Translation (©1995)
The child's father cried out at once, "I believe! Help my lack of faith."
King James Bible
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
American King James Version
And straightway the father of the child cried out, and said with tears, Lord, I believe; help you my unbelief.
American Standard Version
Straightway the father of the child cried out, and said, I believe; help thou mine unbelief.
Bible in Basic English
Straight away the father of the child gave a cry, saying, I have faith; make my feeble faith stronger.
Douay-Rheims Bible
And immediately the father of the boy crying out, with tears said: I do believe, Lord: help my unbelief.
Darby Bible Translation
And immediately the father of the young child crying out said with tears, I believe, help mine unbelief.
English Revised Version
Straightway the father of the child cried out, and said, I believe; help thou mine unbelief.
Webster's Bible Translation
And immediately the father of the child cried out, and said with tears, Lord, I believe; help thou my unbelief.
Weymouth New Testament
Immediately the father cried out, "I do believe: strengthen my weak faith."
World English Bible
Immediately the father of the child cried out with tears, "I believe. Help my unbelief!"
Young's Literal Translation
and immediately the father of the child, having cried out, with tears said, 'I believe, sir; be helping mine unbelief.'
Geneva Study Bible
And straightway the father of the child cried out, and said with tears, Lord, I believe; help thou mine unbelief.
People's New Testament
9:24 Lord, I believe; help thou my unbelief. The spark of faith has been kindled; if his faith is not strong, he prays the Lord to give him stronger faith. So should always pray the doubting Christian. If your faith is weak, cry for help.
Wesley's Notes
9:24 Help thou mine unbelief -
Although my faith be so small, that it might rather be termed unbelief, yet help me.
Jamieson-Fausset-Brown Bible Commentary
24. And straightway the father of the child cried out, and said with tears, Lord, I believe: help thou mine unbelief-that is,
"It is useless concealing from Thee, O Thou mysterious, mighty Healer, the unbelief that still struggles in this heart of mine; but that heart bears me witness that I do believe in Thee; and if distrust still remains, I disown it, I wrestle with it, I seek help from Thee against it." Two things are very remarkable here:
First, The felt and owned presence of unbelief, which only the strength of the man's faith could have so revealed to his own consciousness. Second, His appeal to Christ for help against his felt unbelief-a feature in the case quite unparalleled, and showing, more than all protestations could have done, the insight he had attained into the existence of a power in Christ more glorious them any he had besought for his poor child. The work was done; and as the commotion and confusion in the crowd was now increasing, Jesus at once, as Lord of spirits, gives the word of command to the dumb and deaf spirit to be gone, never again to return to his victim.
Matthew Henry's Concise Commentary
9:14-29 The father of the suffering youth reflected on the want of power in the disciples; but Christ will have him reckon the disappointment to the want of faith. Very much is promised to our believing. If thou canst believe, it is possible that thy hard heart may be softened, thy spiritual diseases may be cured; and, weak as thou art, thou mayest be able to hold out to the end.
Those that complain of unbelief, must look up to Christ for grace to help them against it, and his grace will be sufficient for them. Whom Christ cures, he cures effectually. But Satan is unwilling to be driven from those that have been long his slaves, and, when he cannot deceive or destroy the sinner, he will cause him all the terror that he can. The disciples must not think to do their work always with the same ease;
some services call for more than ordinary pains.