The lyrics to Pastor López's song Mujercita Buena are a tribute to a good woman, highlighting how unique and rare she is compared to others. The first line of the song, "Una son de cal, otras son de arena" (some are made of lime, others are made of sand) suggests that there are many different types of women, but there is only one good woman. This idea is repeated in the next line, "Pero como tu no hay mujercita buena" (But like you, there is no good woman), emphasizing the singer's admiration for the subject of the song.

The song goes on to describe the singer's devotion to the woman, saying "Sufro si tu sufres, rio si tu ries" (I suffer if you suffer, I laugh if you laugh). He also sings "Canto para ti mujer, mi fiel compañera" (I sing for you woman, my loyal partner), highlighting his appreciation for her. The chorus repeats the first two lines, further emphasizing the unique and rare qualities of the woman.

The second verse reflects on the time the two have spent together and how the singer is happy that she still loves him. The song ends with the chorus, with the singer once again praising the good woman.

Overall, the song is a celebration of a faithful and rare woman who is admired and loved deeply by her partner.