They believe in Allah and the Last Day, and enjoin the right and forbid the wrong, and compete in doing good. They are among the true believers.(Surah Al 'Imran, 114)
The adjective "kamil" in Arabic means perfect, genuine, and complete. The "perfected faith" (kamil iman) discussed in this audiobook represents the highest level of maturity and depth of faith an individual can ever attain. Everyone is responsible for aiming at moral perfection and striving towards that end. No boundaries limit such a noble human endeavour. Each believer who has a deep-seated faith in Allah and strives sincerely to draw closer to Him can display this moral perfection and thus attain the "maturity of faith". One of the purposes of this book is to define the "perfected faith" one can attain through turning to Allah for every deed, striving to earn the approval and friendship of Allah and displaying moral perfection under all circumstances. Another purpose is to make it clear that nothing hinders man from attaining the moral perfection displayed by prophets, provided that he fears and reveres no one but Allah and strives sincerely for His cause. Over and above this, the intention in writing this book is to stress that putting forth a "sincere" effort to attain the hereafter is a praiseworthy act in Allah's sight. In one verse, Allah states the following about this issue: 
But as for anyone who desires the hereafter, and strives for it as he ought to, being a true believer, shall have his endeavours be gratefully acknowledged. (Surat al-Isra’, 19)