أَيْ بُنَيَّ، إِنِّي لَمَّا رَأَيْتُنِي قَدْ بَلَغْتُ سِنّاً، وَرَأَيْتُنِي أَزْدَادُ وَهْناً، بَادَرْتُ بِوَصِيَّتِي إِلَيْكَ، وَأَوْرَدْتُ خِصَالًا مِنْهَا قَبْلَ أَنْ يَعْجَلَ بِي أَجَلِي دُونَ أَنْ أُفْضِيَ إِلَيْكَ بِمَا فِي نَفْسِي، أَوْ أَنْ أُنْقَصَ فِي رَأْيِي كَمَا نُقِصْتُ فِي جِسْمِي، أَوْ يَسْبِقَنِي إِلَيْكَ بَعْضُ غَلَبَاتِ الْهَوَى وَفِتَنِ الدُّنْيَا، فَتَكُونَ كَالصَّعْبِ النَّفُورِ. وَإِنَّمَا قَلْبُ الْحَدَثِ كَالْأَرْضِ الْخَالِيَةِ مَا أُلْقِيَ فِيهَا مِنْ شَيْ‏ءٍ قَبِلَتْهُ، فَبَادَرْتُكَ بِالْأَدَبِ قَبْلَ أَنْ يَقْسُوَ قَلْبُكَ، وَيَشْتَغِلَ لُبُّكَ، لِتَسْتَقْبِلَ بِجِدِّ رَأْيِكَ مِنَ الْأَمْرِ مَا قَدْ كَفَاكَ أَهْلُ التَّجَارِبِ بُغْيَتَهُ وَتَجْرِبَتَهُ، فَتَكُونَ قَدْ كُفِيتَ مَؤُونَةَ الطَّلَبِ، وَعُوفِيتَ مِنْ عِلاَجِ التَّجْرِبَةِ، فَأَتَاكَ مِنْ ذلِكَ مَا قَدْ كُنَّا نَأْتِيهِ، وَاسْتَبَانَ لَكَ مَا رُبَّمَا أَظْلَمَ عَلَيْنَا مِنْهُ.
O’ my child, when I noticed that I was of goodly age and noticed that I was increasing in weakness I hastened with my will for you and wrote down salient points of it lest death overtook me before I divulged to you what I have in my heart, or lest my wit be affected as my body has been affected, or the forces of passions or the mischiefs of the world overtake you making you like a stubborn camel. Certainly, the heart of a young man is like uncultivated land. It accepts whatever is strewn on it. So, I hastened to mould you properly before your heart hardened up and your mind became occupied, so that you might be ready to accept through your intelligence the results of the experience of others and be saved from going through these experiences yourself. In this way, you would avoid the hardship of seeking them and the difficulties of experimenting. Thus, you are getting to know what we had experienced and even those things are becoming clear to you which we might have missed.