Total eclipse.
The Sun and the Moon are so vastly different in diameter (400 times) and so far away from one another (almost 400 times), so when they happen to overlap in the sky, their diameter that appears to us is equal: this is the only way that total eclipse is possible.
Of course, some will chalk this up to "chance". (Satire glasses on) I will add a scientific disclaimer that our brains wanting to make a deeper sense of the universe is totally not a testimony. We only search for love and meaning because everything including us came to being ourselves a way that was totally devoid of love, meaning and purpose. I praise the authority of glorified chemical cocktail beings who evolved by accident. Let them lead the way and tell other evolved chemical cocktails that they are "wrong", because there is no standard to determine rightness and wrongness.