Resucito comes from the verb resucitar, meaning "to resurrect". It's a powerful, dramatic word that you won't find in many pop songs.
Enrique Iglesias uses it to express the transformative power of his lover's touch, singing "Sentir que resucito si me tocas" (To feel that I am resurrected if you touch me). It elevates a simple touch to a life-giving, almost miraculous event, perfectly capturing the song's theme of love as a "religious experience."
Enrique Iglesias is not messing around in this song. He compares being in love to a spiritual awakening, and it's as dramatic and passionate as it sounds! He sings that being with his partner is "casi una experiencia religiosa" (almost a religious experience). Everything becomes magical and intense when they're together: the ground trembles, the night lights up, and silence turns into music. He feels like he can discover infinity with her.
But the feelings are so strong because of the contrast. When he's alone, the night is "fría y sola" (cold and lonely) and he needs her to "callar los demonios que llevo dentro" (silence the demons I carry inside). Her love is literally his salvation. He feels reborn when she touches him, singing "siento que resucito si me tocas" (I feel that I'm resurrected if you touch me). Even a simple kiss is a holy moment: "Besar la boca tuya merece una aleluya" (Kissing your mouth deserves a hallelujah). It's a song about a love so powerful it feels like it can save your soul.