The grace of faith is stemming from the grace of Allah, which Allah exalted us instead of the other nations. Faith is the pure spring that emanates from the sound and sincere innate which distinguished us from the rest of the previous nations who believed in some of their holy books, not whole. The heart is the place that Allah (Subhanahuwatallah) monitors it. The heart is a criterion of the goodness and integrity of the man, the truth of faith in the heart reflected on the rest of the body and organs, and if the heart has a good intention the rest of the body will do well, and if the heart spoiled and corrupted with the bad intention the rest of the body will do as well. Scientists have differed in their points of view towards the truth and significance of faith, therefore they have multiple opinions. Some of them believed that faith is an utterance only by the tongue, and some view that the faith is saying in the tongue and believing in the heart. Some see that the faith is saying in the tongue, believing in the heart and doing in the organs of the body. This study came to identify the views of the speakers and interpreters in the faith and its truth. The study provides a definition to faith linguistically and terminologically and stated the views of the speakers in this issue, then the views of the interpreters. This study has concluded that the truth of faith is ratification, and its place is in the heart; which is what the public and the community of the Sunnis agreed with this opinion due to the abundance and diversity of evidences.