Lyrically, "El Amor" was written by Arjona in an attempt to show all sides of love, explaining that "So many good things about love has been shown, that somebody had to turn it around and tell the bad ones". The song became Arjona's fourth single to reach number one on the US BillboardTop Latin Songs, and the seventh to do so on the Latin Pop Songs chart. It also became his first song ever to reach number one on the Tropical Songs chart, improving his previous peak of number two almost twelve years prior. "El Amor" also topped several national charts from Latin America.
Allmusic's Jose Promis praised Desde un Principio: From the Beginning, calling the album an "ideal introduction" to the artist, although he complained about the songs on it being "truncated", particularly towards the end. The album received a Billboard Latin Music Award for Latin Greatest Hits Album of the Year. Desde un Principio: From the Beginning reached number one on both the Billboard Top Latin Albums and the Billboard Tropical Albums charts, and became the best-selling album of 2000 on both charts. The album was certified gold by the Recording Industry Association of America (RIAA) after shipments reached 500,000 copies.