There’s no such thing as “Immaterial”.
There’s no such thing as Non-Existence or “Nothingness”.
There’s no such thing as a “Beginning” or “End” to “The Universe”.
There’s no such thing as “Impossibility”.
By mere Act of thinking of something, it Exists forever, from that supposed “Beginning of Time” to that supposed “End of Time”. Ideas are Forever / Permanent / Immortal. Every idea, no matter how small, lasts an Eternity.