Here's why:

* Totality is brief: Totality only lasts for a few minutes at most.

* The sun is completely blocked: During totality, the moon blocks all of the sun's direct light and radiation.

* The corona is visible: The sun's outer atmosphere, called the corona, becomes visible during totality, and it's safe to look at.

However, it is extremely important to note that it is never safe to look directly at the sun at any other time during a solar eclipse.

* Partial eclipse and annular eclipse: During these phases, the sun is not completely blocked, and looking at it can cause severe eye damage, including permanent blindness.

* Looking at the sun with any kind of optical aid: Using binoculars, telescopes, cameras, or even sunglasses is extremely dangerous and can cause immediate and irreparable eye damage.

Safe ways to view a solar eclipse:

* Solar eclipse glasses: These glasses are specifically designed to filter out harmful solar radiation. They must meet the ISO 12312-2 international standard for safety.

* Solar viewers: Handheld solar viewers are also available, and they provide a safe way to observe the eclipse.

* Pinhole projection: You can create a pinhole projector using cardboard and foil to project an image of the eclipsed sun onto a surface.

Remember: Never look directly at the sun during a solar eclipse without proper eye protection.

If you're unsure about the safety of a particular viewing method, it's best to consult with an astronomer or a qualified expert.