(Something Inside) So Strong is a 1987 single written and recorded by British singer-songwriter Labi Siffre. The song was one of the biggest successes of Siffre's career, and peaked at number four in the United Kingdom.The song was written in 1984, inspired by a TV documentary on Apartheid South Africa seen by Siffre in which white soldiers were filmed shooting at black civilians in the street.he song was one of the biggest successes of Siffre's career, and peaked at number four in the United Kingdom. The song was written in 1984, inspired by a TV documentary on Apartheid South Africa seen by Siffre in which white soldiers were filmed shooting at black civilians in the street.