Wherefore I must briefen the narrative.
First of all, Bergson is right.

Life cannot be explained in intellectual terms.

As Confucius said long ago: "When we are so ignorant of life, can we know death ?" And ignorant of life we truly are when we cannot explain it in terms of the understanding.

We know life only phenomenally, as a savage may know a dynamo; but we know nothing of life noumenonally, nothing of the nature of the intrinsic stuff of life.
Secondly, Marinetti is wrong when he claims that matter is the only mystery and the only reality.

I say and as you, my reader, realize, I speak with authority--I say that matter is the only illusion.