The song is a power ballad, with St-Pier attempting to resurrect what appears to be a doomed relationship, telling her lover that she still has feelings for him, even though neither of them have expressed them recently.
In France, the single charted for 26 weeks in the top 100. It started at number 11 on 5 May 2001, then reached the top ten and peaked at number two in the sixth and seventh weeks. It was unable to dislodge MC Solaar's "Hasta la vista" which topped the chart then. Then the single dropped almost continuously on the chart, totalling nine weeks in the top ten and 19 weeks in the top 50. It achieved Gold status awarded by the SNEP and was 28th on the Annual Chart.
In Belgium (Wallonia), "Je n'ai que mon âme" went to number 11 on 12 May 2001, then jumped to number three and hit number two the two weeks later, being blocked behind Daddy DJ's eponymous single. Then it dropped rather quickly on the chart, remaining for seven weeks in the top ten and 12 weeks in the top 40. It was the 17th best-selling single of the year.