Who said "The Tesseract has shown me the true nature of existence."?

This quote is attributed to Loki's Tesseract.

The Tesseract has shown me the true nature of existence. - Loki's Tesseract

"The Tesseract has shown me the true nature of existence."

Loki's Tesseract Truth

"I am burdened with glorious purpose."

"Kneel before your king."

"Freedom is life's great illusion."

"I will never be your slave again."

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."