He knew he was still too weak,
he would keep losing this battle.
So in a deal with an angel,
he gave up his free will.
He voluntarily put himself in a prison,
with no stimulation, only his darkness appeared.
For thousands of years, he would repeatedly practice facing his sadness, facing his despair.
Time passed, he forgot who he was, forgot  there was any other place in the world besides
this dark hole,
that this was only a training ground.
He would become the diamond that is forged in the depth of the earth,
were only pressure and solid ground exists, no air to float in.
These minds who chose this path, were not regular diamonds.
They grew in a black hole where pressure gradually became infinite.