To get into the doorway in the library that is blocked by Malice in The Legend of Zelda: Breath of the Wild, you need to follow these steps:

1. Locate the Malice Blockage: Identify the doorway in the library that is covered by the Malice, a black, gooey substance that blocks your path.

2. Find the Eye: Look for an eyeball that is visible through the Malice. This eyeball is usually located in a hole or a window that is partially covered by the Malice.

3. Shoot the Eye: Use an arrow to shoot the eyeball. This action will clear out a section of the Malice, allowing you to proceed.

4. Clear More Malice (Optional): If the cleared section is not enough to access the doorway, you may need to repeat the process or find another way to clear more Malice. However, shooting the eyeball should be sufficient for most cases.

5. Proceed Through the Doorway: Once the Malice has been cleared, you should be able to enter the doorway and continue through the library.