The phrase from the beginning means starting at the first point, with nothing skipped. It can also mean starting over, returning to the start to review, explain, or redo.
Let us, therefore, foresake the vanity of the crowd and their false teachings, and turn back to the word delivered to us from the beginning. Polycarp
I've been killing characters my entire career, maybe I'm just a bloody minded bastard, I don't know, [but] when my characters are in danger, I want you to be afraid to turn the page (and to do that) you need to show right from the beginning that you're playing for keeps. George R. R. Martin
No cause is left but the most ancient of all, the one, in fact, that from the beginning of our history has determined the very existence of politics, the cause of freedom versus tyranny. Hannah Arendt
I should like to suggest to you that the cause of all the economic troubles is that we have an economic system which tries to maintain an equality of value between two things, which it would be better to recognise from the beginning as of unequal value. Paul Dirac
Measure a man by his actions fully, from the beginning to the end. Don't take a piece out of my life or a song out of my music and say this is what I'm about, because you know better than that. Tupac Shakur
If you suffer defeat, start again from the beginning. French Proverb