How did Einstein prove e=mc2

Einstein prove e=mc²

Sir Albert Einstein’s arrival at E=mc2 helps us appreciate that we are all capable of achieving similar breakthroughs. Each of us is capable of waking up one day and realising that:

The truth about life may not be what we’ve been told.

The truth about life may be very different from what most learned people believe.

We don’t always need proof, evidence, or the agreement of others to embrace a new “truth” if we have good reason to believe in its utility.