Moleque is a Brazilian Portuguese word that refers to a young boy, often with a connotation of being a bit mischievous or a 'rascal'. It's a charming and informal term.
In the song, the lyric "Que, desde moleque, eu já saquei" translates to "That, since I was a kid, I already understood." It evokes a sense of youthful wisdom and early realization, making it an interesting and relatable word for learners.
"Serei Luz" ("I Will Be Light") is a reggae song about deciding to be a source of light wherever you go, and refusing to make that conditional on who you meet.
The promise sits in the refrain - "aonde quer que eu vá, serei luz" (wherever I go, I will be light) - and the verses spell out what it costs. Colour, creed, gender and religion are set aside explicitly, and a blessing is treated as the same blessing whether it arrives as "amém", "axé" or "shalom". The singer asks for the arms, the head, the smile and the heart to be opened together, not one at a time.
The practical advice is deliberately plain: if you can't improve something, at least don't make it worse; do good without first checking who deserves it; we are brothers. Respect, the song says, comes from above - which lets it argue for tolerance without arguing for any one faith.
Thiaguinho's feature keeps the song on the warm, communal side of that message rather than the preachy one: by the end the refrain is being sung back as a shared promise instead of a personal one.