<P> The poem was adapted and performed as a song by Joni Mitchell on her 2007 album Shine . It was also performed by Roger Whittaker under the title "A Song for Erik". "If --" is also referred to in the song' If (When You Go)' by Judie Tzuke from the album Moon on a Mirrorball, as well as in the second verse of "Sowing Season", a song by rock band Brand New on their album The Devil and God Are Raging Inside Me . </P> <P> The first lines of the poem are used as a password in the 2015 film Mission: Impossible--Rogue Nation . </P> <P> In 2016, the Boston Red Sox used the poem in a short video tribute to retiring player David Ortiz, narrated by Kevin Spacey . </P>

What is the poem if by rudyard kipling