The true friend is Allah who wants all goodness for his servants

Allah provided numerous blessings for his servants and created this life on earth as a trial stage for them. Every provision they will need, and like, had been prepared for them way before human beings were even created. The air they breathe, the birds that fly in the sky (each one more beautiful than the other), the plants that grow so pretty and in countless diversity, the flowers that bloom which are extremely aesthetic, unique blessings, the people they love, the most beautiful and cutest creatures that generate extreme excitement in the heart, a flawless balance system, and many more detailed creatures, were created by Allah for Himself.

Humans find everything that they need as ready when they come to life. They are all endowed with great comfort. Everything is proper to its own sizes and life conditions. Fruits, food, and the whole world, with the every single detail, are completely suitable for the life conditions of human beings. However, humans almost never show any effort to obtain these. They are faced with an excellent balance and harmony. All of these are created by Allah up to the tiniest details. Moreover, for the life on earth, which is in the trial stage, Allah sent a holy book via His prophets which contains everything in it to make it as a guidance for His servants. This holy book contains every issue that humans need to address and that clearly explains the ways of attaining Allah's sake: "... We have not omitted anything from the Book – then they will be gathered to their Lord.” (Surat al-An'am, 38)

Allah sent this guidance, a holy book, that distinguishes right from wrong, that depicts the behaviors which would be suitable for Allah's sake, that is full of wisdom, and which completely explains every issue that is needed to be known:
 

This is a Book We have sent down to you so that you can bring mankind from the darkness to the light, by the permission of their Lord, to the Path of the Almighty, the Praiseworthy. (Surah Ibrahim, 1)

For humans who find everything ready with the most comprehensive details, it is their task to live their life according to the morals of the Quran and based on the orders and advices Allah gives. As a servant who is turning towards Allah, who is the real Friend and for whom He created the most beautiful details with His endless wisdom, it is important to shape his life suitable for the sake of Allah, who is his Protector. That is Allah, who is to be liked, to be remembered, to be exalted, to be trusted, to be merited, and to be turned towards as a real Friend because He bestowed everything to human beings even before humans knew these. Allah is the only Protector of those who know that Allah is the only Friend, who takes shelter in His power and strength, and who trusts His supreme wisdom and mercy.

A person who knows that everything Allah created is good, prosperous, and a revelation of a supreme wisdom, would only trust his Lord and would only take shelter in Him. Therefore, in this world that is created as a trial stage, one of the fundamental features of a believing person should be trust in Allah. Trust in Allah is a person's reliance to Allah and to accept Him as his trustee. It is the requirement of faith to have a deep trust in Allah if a Muslim recognizes that every moment and every event that he deals with is created by Allah. That is one of the most essential features of faith--to show submission to Allah who created humans when they were nothing and who surrounds humans with His blessings everywhere. There is no one else to accept as a trustee other than Allah who creates goodness with constant and endless good morals. Therefore, Allah is the only presence to have trust in for a Muslim who lives according to the morals of the Quran. Allah orders that: “And put your trust in Allah. Allah suffices as a Guardian.” (Surat al-Ahzab, 3)