Convictions are mentioned in the Quran in these verses:

[3:154] After the setback, He sent down upon you peaceful slumber that pacified some of you. Others among you were selfishly concerned about themselves. They harbored thoughts about God that were not right – the same thoughts they had harbored during the days of ignorance. Thus, they said, “Is anything up to us?” Say, “Everything is up to God.” They concealed inside themselves what they did not reveal to you. They said, “If it was up to us, none of us would have been killed in this battle.” Say, “Had you stayed in your homes, those destined to be killed would have crawled into their death beds.” God thus puts you to the test to bring out your true convictions, and to test what is in your hearts. God is fully aware of the innermost thoughts.

[6:113] This is to let the minds of those who do not believe in the Hereafter listen to such fabrications, and accept them, and thus expose their real convictions.

[20:7] Whether you declare your convictions (or not) He knows the secret, and what is even more hidden.

[34:21] He never had any power over them. But we thus distinguish those who believe in the Hereafter from those who are doubtful about it. Your Lord is in full control of all things.

To learn more, read the Quran in English.

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