Meher Baba, Indian God-Man who lived from 1894-1969, had a personal mantra or philosophical phrase which influenced the title of a 1988 pop musical hit. What was it?

The infectious, chart-topping 1988 a cappella hit "Don't Worry, Be Happy" by musician Bobby McFerrin was directly inspired by the teachings of Indian spiritual master Meher Baba. McFerrin saw a poster of the smiling guru that featured the phrase "Don't Worry, Be Happy," a slight inversion of Baba's common expression. The simple yet profound message struck a chord, and McFerrin composed the song, which went on to become the first a cappella track to reach number one on the Billboard Hot 100 chart.

Meher Baba, who referred to himself as the Avatar (Review) or God in human form, attracted a large international following during his lifetime. One of his most defining characteristics was his vow of silence, which he maintained for 44 years from 1925 until his death. He communicated with his disciples using an alphabet board and a unique system of hand gestures. Amidst his complex spiritual philosophy, simple maxims like "Be Happy, Don't Worry" were used to distill his core message of finding inner peace by detaching from worldly anxieties and focusing on love for God.