“Concentrate on one thing at a time or you will achieve nothing. – Trying to do two or more things at a time, when even one on its own needs full effort, means that none of them will be accomplished properly.”,Paczolay, Gyula (1997). “X”. European proverbs; in 55 languages, with equivalents in Arabic, Persian, Sanskrit, Chinese and Japanese. Veszprémi Nyomda. p. X. ISBN 1-875943-44-7.Mawr, E.B. (1885). Analogous Proverbs in Ten Languages. p. 102.