He's famous for having debated the nature of time with Einstein, and it did not go well for M. Bergson. But what happened a few years later, was the development of theories of Quantum Mechanics. This was viewed by philosophers as a vindication of Bergson's position. Unfortunately, the prominent role of uncertainty and randomness in that school of physics leaked over into areas of philosophy where it is not truly applicable. So in a vague but undeniable way, we may have M. Bergson to blame for Deepak Chopra and other such slime molds using the terminology of real science to bilk rubes out of their money for the fruits of pseudo-science.
In any case, I love this quote from On Intuition vs. Intellect - 1907:
Fortunately, some are born with spiritual immune systems that sooner or later give rejection to the illusory worldview grafted upon then from birth through social conditioning. They begin sensing that something is amiss, and start looking for answers. Inner knowledge and anomalous outer experiences show them a side of reality others are oblivious to, and so begins the journey of awakening. Each step of the journey is made by following the heart instead of the crowd, and by choosing knowledge over veils of ignorance.
It's a testament to how it's both difficult and possible to escape from the cave of mythical shadows into reality.