If you are learning the song on guitar or keyboard, here are the essential elements: J. Neto - Pensando Bem | COM LETRA
The lyrics acknowledge human faults ("As muitas falhas que cometo contra Ti") and ask for divine forgiveness and companionship. J Neto - Pensando Bem
It explores the idea that life without Jesus is a "dead-end" and compared to being a "living dead". If you are learning the song on guitar