Engelbert Humperdinck's rendition of the song "Aquarius/Let The Sunshine In" is a cover of a popular song from the musical "Hair." The song itself carries a strong theme of optimism, peace, and love, reflecting the values and ideals of the hippie counterculture of the 1960s. The lyrics refer to the astrological age of Aquarius, which represents a period of enlightenment, harmony, and understanding. It suggests that when celestial events like the alignment of the moon with the Seventh House and Jupiter with Mars occur, it will usher in a time of peace and love, guiding the planets and steering the stars. The song emphasizes the need for unity, trust, and compassion among people, promoting a world free from falsehoods, derisions, and mistreatment. It speaks of a society where harmony and understanding prevail, where people can experience golden living dreams and visions. The "mystic crystal revelation" and the "mind's true liberation" mentioned in the lyrics imply a desire for spiritual awakening and intellectual freedom. Towards the end of the song, the repeated chorus of "Let the sunshine, let the sunshine in, the sunshine in" encourages individuals to open up their hearts, let positivity and light shine in, and embrace love and happiness. It emphasizes the transformative power of sunlight, both literally and metaphorically, to bring warmth, joy, and healing into one's life. Overall, "Aquarius/Let The Sunshine In" is an anthem that envisions a better world based on love, unity, and understanding, urging individuals to foster positive change and let positivity enter their lives and the world around them.