Perhaps we dont see the Sun for what it is. For example, what if the Sun (and other stars but this is more complicated to explain) is the inner part of a black hole ? (A white fountain) So if you fall into a black hole (and your matter resist this process, what he would not for sure, but let say at least the disorganized matter can, as a "gedanken experiment"). So you fall in, and soon you pass the Schwarzchild limit, ooops, the space-time, like à sock, invert. What would we see ? Not a hole from the inside, but a... bright sphere, like the Sun. Bright because the light coming from outside push in at very fast rate, because, in the hole, time get very slow relativ to the outside. An you can go around this bright sphere and doing so you are not aware that you are in a hole and that the surface of the sphere is the border of the hole. This hole is some kind of Hell for the matter... So what, you ask me, what has this speculation to do with the fact that the sun could be something else we believe we know ? The light... Because outside, it is the Heaven (much bigger and it is why the Hell is a hole), and the purity of the light went into the hole. But why do the Sun burn ? No, the sun do not burn holly matter, it burns what is in contradiction with the light. This explain eventualy the million degrees mystery on the surface of the Sun. It is probably the Firewall phenomenon predicted by some physicists near the surface of a black hole. https://en.wikipedia.org/wiki/Firewall_(physics) https://www.space.com/17137-how-hot-is-the-sun.html This is extremely speculativ, i agree, but if that can help to understand the purpose of life, why not pay attention and verify.