Since Allah is the decision-maker, every happening is in favor of the believers: because everything has been planned for the benefit of religion and for the hereafter of the believers. For that reason, believers trust and rely only on Allah. He is the only protector. What a believer should do is to behave as Allah wants him to: fulfilling his responsibilities but waiting to see the result, believing that it has already been planned by Allah. Below verses express this mystery which is unknown to unbelievers.
"... And for those who fear Allah, he (ever) prepares a way out, and he provides for him from (sources) he never could imagine. And if any one puts his trust in Allah, sufficient is (Allah) for him. For Allah will surely accomplish his purpose: verily, for all things has Allah appointed a due proportion."(At-talaq 2-3)
"say: "nothing will happen to us except what Allah has decreed for us: he is our protector": and on Allah let the believers put their trust."(Al-tawba, 51)
What the believers should say to the unbelievers is also stated in the Qur'an: "no reason have we why we should not put our trust on Allah. Indeed he has guided us to the ways we (follow). We shall certainly bear with patience all the hurt you may cause us. For those who put their trust should put their trust on Allah."(Ibrahim 12)
"if Allah helps you, none can overcome you: if he forsakes you, who is there, after that, that can help you? In Allah, then, let believers put their trust."(Al-e-Imran 160)
Moral Values Of The Qur'an; By Harun Yahya