Already a celebrated songwriter by the time of the third Impressions album,Curtis Mayfield introduced a political element to his material with the Top Ten hit "Keep on Pushing." An anthem of the burgeoning civil-rights movement (the 1964 Civil Rights Act was signed several weeks after its release), "Keep on Pushing" cemented his blend of gospel optimism with a relentless spirit of self-improvement. Though it was the only message song present, the album featured all the hallmarks of an Impressions set: impeccably smooth harmonies, the dynamic horn charts of Johnny Pate, and many more of Mayfield 's irresistible songs (each with a clever spin on the usual love lyric as well as a strong sense of melody). "Talking About My Baby," the album's other big hit, was an adoring love song driven by a simple chorus and delivered by soul music's greatest harmonists. The simple ballad "I've Been Trying" was one of the most delicate and powerful the group had ever delivered, and the gospel march "Amen" became a Top Ten pop hit in early 1965 after its use in the Sidney Poitier film Lilies of the Field (for which Poitier became the first African-American to receive an Academy award). Keep on Pushing was the Impressions' first Top Ten album hit, and an excellent introduction for pop audiences just waking up to the inspirational power of soul music's finest group.