[1] The song was written by Goodrem, Brian McFadden, Stuart Crichton, and Tommy Lee James and was produced by John Shanks.

[1] According to an article in the Herald Sun, the song is "a more guitar-driven vibe and updates Goodrem's sound.

[3] According to her biography on her official site, the song "reaffirms new beginnings, celebrates perseverance, and rejoices in moving forward.

"[5] The song was also used as the third opening theme music to the Japanese anime series Deltora Quest, which ran from 2007 to 2008.

News.com.au commented: "'In This Life' is undoubtedly a Delta Goodrem song, it unveils a more sexy and mature sound for the artist who dominated the Australian airwaves after the release of her debut single, 'Born to Try'.

"[1] Billboard magazine gave the song a positive review, introducing Goodrem in the United States.

Reviewer Chuck Taylor said about the song: "In This Life" is an ideal vehicle to fuel horsepower, showcasing frantic piano, turbine tempo, a singalong lyric about giving into love ... and a vocal that illustrates incomparable prowess.

In late March, Goodrem returned from California, where she filmed a new clip for the US version of "In This Life".

[10] Throughout the video different leaves are created around her that can be compared with the way Goodrem's Mistaken Identity album cover was designed.

[12] The week after it moved to number two, before eventually climbing to the top spot and displacing Matchbox Twenty's "How Far We've Come".