When there is danger in your wandering in the wilderness of ignorance...
When there is danger in your wandering in the wilderness of ignorance, the possibility of losing sight of the goal which you want to attain and of reaching the end aimed at, then it is better to give up the quest than to advance facing uncertain dangers and unforeseen risks. Advise people to do good and to live virtuously because you are fit to give such advice. Let your words and deeds teach the world lessons on how to abstain from wickedness and vicious deeds.
Try your best to keep away from those who indulge in vices and sins. Fight, whenever required, to defend the cause of Allah. When you think of defending the cause of Allah do not be afraid that people will laugh at you, censure your action or slander you. Fearlessly and boldly help truth and justice. Bear patiently the sufferings and face bravely the obstacles which come in your way when you follow the truth and when you try to uphold it.
Adhere to the cause of truth and justice wherever you find it. Try to be well-versed in Islamic Jurisprudence and theology and acquire a thorough knowledge of the canons of this religion. Develop the habit of patience against sufferings, calamities and adversities. This virtue of patience is one of the highest values of morality and nobility of character and it is the best habit that one can develop.
Trust in Allah and let your mind seek His protection in every calamity and suffering because you will thus entrust yourself and your affairs to the Best Trustee and to the Mightiest Guardian. Do not seek help or protection from anybody but Allah. Reserve your prayers, your requests, your solicitations, your supplications, and your entreaties to Him and Him alone because to grant, to give, to confer and to bestow, as well as to withhold, to deprive, to refuse, and to debar, lies only in His Power.
Ask as much of His Blessings and seek as much of His Guidance as you can. Try to understand my exhortation, ponder over them deeply; do not take them lightly and do not turn away from them because the best knowledge is that which benefits the listener. The knowledge which does not benefit anybody is useless, not valuable and not worth learning and remembering. My dear son!
When I realized that I was getting old and when I felt that weakness and feebleness are gradually creeping into me then I hastened to advise you as to the best ways of leading a noble, virtuous and useful life.