You can play a shoestring if you're sincere.
Source: From Journey in Word, ed. Cyndi Craven; an internet collection of quotations
-- John Coltrane, (Sep 23 1926-1967), US jazz musician, composer, bandleader; His influence on jazz of the 1960s and '70s was at least as strong as Charlie Parker's had been in the 1940s and '50s.