I asked my grandfather: "What makes a man wise?"
He typed out this:
Confused, I asked him to explain....
He ignored me and typed out the following:
-−−− -−−- −−- −−-- ---−
Please, I really want to know what makes a man wise!
You must solve the second line first.
The "Dark Lines" are just noise.
Somebody got really close already (in the comments of Chowzen's answer)
Hint 3 is directly related to Hint 4 (3 will help solve 4)
Hint 3 was a response towards a specific comment(s) on one of the answers.
The Morse code in the box is treated the same as the colors. Here's a link to a cleaned up image.