Question about "start or begin"

Dear Toreston:

Thank you a lot , I read your article and it help me to understand the difference between " start & begin" .

Please can you explain what’s the meaning of these words because I cannot understand it ?
«In the beginning was the word and the word was with God and the word was God».

Regards
Moayad

I’m sure about just one thing: that’s a Bible’s verse. lol.