The best manifestation of proper education and wisdom is finding own faults. Meaning human being is able to sink into his/her own deep thoughts, tendencies, deeds and promises and find own faults, point at them and remove them from himself/herself. Expecting human being not to make mistakes is wrong, human being is expected to make mistakes but it must be expected that he/she does not repeat the same mistakes. Human being must recognise his/her mistakes and make sure that they are not repeated.
Martyr Morteza Motahhari’s Book Collection, Vol. 22, page 115.