Viejita is a diminutive of vieja (old woman), but it's used as a term of endearment, meaning "dear old mother" or "little old lady." It's a very common and affectionate way to refer to one's mother in many Spanish-speaking cultures.
In this song, the artist repeatedly uses viejita to express deep love, respect, and gratitude for his mother, highlighting her sacrifices and his desire to repay her. It's a beautiful example of how diminutives can convey warmth and affection in Spanish.
Ever felt like life didn't turn out exactly how you imagined it as a kid? That's the heart of "Los Caminos De La Vida" (The Paths of Life). The singer reflects on how he used to think life was easy, but has now discovered its paths are "muy difĂcil de andarlos" (very difficult to walk). He contrasts his carefree childhood, when his mother worked tirelessly to provide everything he needed, with the harsh realities of adulthood.
Now grown up, the singer sees his mother is tired from a lifetime of sacrifice for him and his brother. The song becomes a powerful promise to her. He feels it's his turn to take care of her, declaring, "por mi vieja lucharé hasta el fin" (for my old lady, I will fight until the end). It's a touching story about growing up, realizing the sacrifices our parents make, and the deep desire to repay their love and hard work before it's too late.