For that matter what is knowledge? Is it the count of synapses that have arranged into a pattern in the sum of all humans who have had brains that had synapses in them? And because the number of humans who have thus far existed can be counted, it's finite?
And 'knowledge' is only expanded when people look beyond conventionally accepted 'knowledge'.
"Often moments come looking for us". - Robert Frank
"Make good art!" - Neil Gaiman
"...the heart and mind are the true lens of the camera". - Yousuf Karsh