मनोजवम् मारुततुल्यवेगम् जितेन्द्रियम् बुद्धिमताम् वरिष्ठम्। Tulsidas has prepared this to inspire spiritual aspirants to be devotees of Lord Rama so that they are blessed and guarded by Hanuman, and therefore are spiritually progressing. Lord Hanuman don't just stands for Actual physical strength; he also stands for psychological strength. As per https://studio-directory.com/listings13212154/about-hanuman-chalisa