Besides being the name of a New Found Glory album, a catalyst is something that allows a chemical reaction to happen either faster or under circumstances that would be impossible without the catalyst.
The catalyst is necessary for the reaction to occur in the current state. Otherwise, the catalyst wouldn’t be a catalyst – it would be an accelerant.
What catalysts do you need in your life to make the change you’re looking to make? After all, if you didn’t need it, the change would have already been made.