Authors:

Those experienced in work must take up the study of theory and must read seriously; only then will they be able to systematize and synthesize their experience and raise it to the level of theory, only then will they not mistake their partial experience for universal truth and not commit empiricist errors.

Mao Zedong (2017). “Quotations from Chairman Mao Tse-tung (The Little Red Book) & Other Works”, p.156, Lulu.com
Those experienced in work must take up the study of theory and must read seriously; only then will they be able to systematize and synthesize their experience and raise it to the level of theory, only then will they not