It is highly unlikely that William Shakespeare and George Wither used the same life motto of Christopher Marlowe!
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("Quod me nutrit me destruit")
<----Marlowe had chosen for his own portrait (1585) at the age of 21.
<----Marlowe had chosen for his own portrait (1585) at the age of 21.
Shakespeare in Pericles (Q1-1609) and in his Sonnet 73 (1609) as well as George Wither in his Collection of emblemes (1635 Book I /Illust.15, Book 2/Illust.VI) only slighty modified Marlowe's Motto (see Faksimiles and Pictures)
There is logic evidence that both Wither** and Shakespeare represent pseudonyms of a single author (surviving "incognito" Marlowe in his "second" life),
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** Do not trust-->Encyclopedias!
They do not tell you about a George Wither who was born before 1588. I recommend George Wither's book : An A.B.C. for Layeman [1585] dedicated to William Cecil)