Good at first

We all begin with good intend, is so hard to keep this way, were not bad at all but several times we're falling wrong, we all begin with a 10, like profesors always say, but somehow in the way we always crash against an unknown wall, we'll never know that wall is there, it will be invisible every time, then How to recover that good intend? How to stop this wrong walking? How to change the end?

I don't know, what I know is that "we all begin with good intend" and we have to change the world right before it change ourselves.