Power Seeks
Power always seeks a vessel. It is always there to be used at the whim of the mind.
We ignore preparation
Unless adequately prepared for the power, the mind may become corrupted once that power resides within the vessel.
Loss and Desperation
He didn't know it at the time, but there was a cost to consuming the energies. The intent was to utilize the magic just for the healing of his loved ones. He missed who they were so dearly before disease ravaged their minds. Instead of using the infinite for balance, his knowledge and drive to heal who was precious to him contained the power within a state of greed.
Absolute Power
In recognition of his greed, the power corrupted him absolutely. The corruption condemned not only his loved ones, but also the sentient beings afflicted by the corruption.
Coming Soon:
You are simply amazing @scholaris. I'm Patiently waiting for this to kick start again.