قل لن يصيبنا إلا ما كتب الله لنا هو مولانا ۚ وعلى الله فليتوكل المؤمنون

Say, "Never will we be struck except by what Allah has decreed for us; HE is our protector." And upon Allah let the believers rely. 

(Translation of the interpretation of the meaning of the Ayah according to Sahih International)

[Qur'an 9:51]

• Belief in Qadr

A person who believes in Qadr knows that what is happening is happening with purpose. A person who believes in Qadr has Tawakkul on Allah. He feels content. He does Sabr.