Hadith 31-155

وَبِهذَا الإِسنادِ قالَ: قالَ عَلِىُّ أَبِي طالِبٍ‏ عَلَيْهِ السَّلامُ خَمْسَةٌ لَوْرَ حَلتُم فيهِنَّ المَطايا لَم تَقدِرُوا عَلى مِثلِهِنَّ لا يَخافُ عَبْدٌ إِلّا ذَنبَهُ، وَلا يَرجُو إِلّا رَبَّهُ، وَلا يَستَحيَي الجاهِلُ إِذا سُئِلَ عَمَّا لا يَعْلَمُ أَن يَقُولَ: لا أَعْلَمُ وَلا يَستَحيي أَحدُكُم إِذا لَمْ يَعْلَم أَن يَتَعَلَّمَ؛ وَالصَّبرُ مِنَ الإِيمانِ بِمَنْزِلَةِ الرَّأسِ مِنَ الجَسَدِ، وَلا إِيمانَ لِمَنْ لا صَبْرَ لَهُ.

According to the same documentation, Ali ibn Abi Talib (a.s.) said, “There are five issues the like of which you cannot find no matter how hard you try. A servant (i.e. a person) should have no fear but from his own sins. One should have no hopes from anyone but his Lord. When asked something one should not be too shy to say, “I do not know”, if he does not know. The relationship of patience and perseverance to faith is like that of the head to the body. One who does not have perseverance does not have faith.”