Mindfulness Is The Antidote for Perceived Problems
I would argue that all of man-made problems are the result of ignorance. We act without thinking of the consequences of our actions or we outright disregard them.
This is where self-exploration comes in. If we habitually take the time to sit down with ourselves, intentionally and genuinely, and really do some deep introspection about the motives for our actions, much (if not all) of our self-caused problems can be eliminated.
There would be no more need to rush into any decisions, or do/say something that you’ll regret later. Phrased positively, what Pascal is saying here is that mindfulness and intentionality are the antidotes to a turbulent life.