Tenet /destiny is not a biblical concept . Even in the case of Adam and Eve their fall was not predetermined, it was a matter of choice, if they ate the fruit they fall and if not, they live. Destiny is more like the path you choose to follow. If you are lazy, you become poor and if you're hardworking ,it yield you good result. Fate is always seen as predetermined course of event beyond human control. The question is , if we really can't change destiny, then why try ? I think Destiny is a case of fatalism

Nothing happens accidentally, God has given us a free will. We get exactly the outcome of our actions.