A man is standing on a railroad track and he sees a speed-train coming towards him. So he had knowledge of those facts.
He realises that him standing on the track very the fast train will soon hit and seriously cause damage. Making sense of the facts he has gathered gives him understanding of the situation he is in and how it most likely will result.
The man does not want to get hurt and comprehends the need to make the right decision followed by action. Using wisdom he steps aside from the track and the train goes pass him.
I don't know much, so I try to gather all the knowledge I can get, while trying to understand and make sense of my gatherings and hopefully make more wise decision in my life then bad ones.
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