Earlier quoted context omitted.
Anger is a mind killer. Build software out of love. Love for engineering, innovation, creation, and love of working with people who feel the same way.
A righteous, passionate anger can be indistinguishable from love. Having and committing to something worth fighting over, however bloody the battles may be, can make a life just a meaningful as one that practices disciplined quiescence, reflection, acceptance, etc. Love is what it is because it must paradoxically accept its opposites; love can be anger, anger can be love. The real mind killer is a pat moralism! Thus…
These are just word games. Blurring and mixing what we mean with different words. To say what? Passion takes different forms and can be a hell of a motivator? Nobody disputes that.
There's clearly a difference between anger and love. GP was addressing that difference and recommended to focus on the healthier of the two. That's good advice.