Hi Casian
i think as the Coptic orthodox church we don't believe in predestination from our baptist time on till death we are in completely caring of God Jesus Christ accept if we ignore his holy spirit till the end of our life what is happen to us …
The key of happiness in glory of God in our all deed the happiness is spiritual matter before to be material matter satisfy God in our all deed ,be holy as he is holy .....! you will be happy for ever in earth as in Heaven