What is the meaning of "What befell a believer was not meant to miss him, and what missed him was not meant to befall him"?

The meaning of the phrase "What has befallen you was not going to miss you, and what has missed you was not going to befall you" was mentioned in a narration from 'Ubadah ibn al-Samit, and Ahmad elevated it to the Prophet, peace be upon him. It is connected to the necessity of believing in God's divine decree, and that everything that happens to a person has been predestined by God.