It's a passage no one can avoid unless they have the misfortune to be fatherless. There is no need nor reason to "get over" it. My condolences, he sounds like a good man who had a good and interesting life. I hope I am not being presumptuous but this poetry from Aeschylus has helped me with loss, take care:
Even in our sleep, pain which cannot forget
falls drop by drop upon the heart,
until, in our own despair,
against our will,
comes wisdom
through the awful grace of God
