This is a song about the power of self-belief and the ability to create your own destiny. It speaks to the strength of the human spirit and the capacity to achieve anything you set your mind to. It encourages listeners to believe in themselves and to never give up on their dreams,
From Wikipedia
Puedo prometer y prometo is a classic catchphrase said by Spanish politician Adolfo Suárez, first said in the first post-Franco general elections in Spain in 1977.