Mstislav Keldysh

Soviet mathematician and physicist (1911-1978).

Born February 10th, 1911 in Riga. [ref]

Died June 24th, 1978 at 67 years old in Moscow (heart failure).

Occupations
engineer, mathematician, physicist, politician, university teacher
Wikipedia

There is a sacredness in tears. They are not the mark of weakness, but of power. They speak more eloquently than ten thousand tongues. They are the messengers of overwhelming grief, of deep contrition, and of unspeakable love. Washington Irving