Tarek, as anyone else, is not a perfect person. However, he has learned and acquired a lot of valued concepts throughout both settled and unsteady phases of his previous decades (and still learning!).

Non-Stop Willingness to Learn:
The intelligent person is the one who learns from his own trials, the genius is the one who shortens the way and learns from others' experiences more than from his own ones, while the stupid one is the one who has no willingness to learn anything.

All Religions came to spread Moral Principles among mankind:
Killing people, "out of an announced war to retrieve a taken-right or land", is against any religion.
In Islam, Muhammad (PBUH) had always instructed his soldiers, as for the ethical rules of wars and battles, to decently treat women, children, elderly and unarmed men. This ethical trend was practically proven by Muhammad when he (PBUH) set the non-believers free on conquering Mecca despite his victory. This noble gesture was the reason why many of them embraced Islam and it is this nobility and forgiveness that forms the essence of Islam. Such a fact should be clearly conveyed to the whole world.

Touching and Enriching People's Life is a Must:
Business that doesn't touch and enrich people's life is unvalued.  
قال تعالى : "فأما الزبدُ فيذهبُ جُفاءً وأما ما ينفعُ الناسَ فيمكثُ في الأرض"

The Struggle Way to Success is much more Pleasant than Success itself :
Enjoy every moment you struggle to overcome any hardness facing your way. It will always represent the fadeless joyful memories of your life.