One difference between a renaissance mass and a motet is: a mass is sung unaccompanied, a motet has instrumental accompaniment a
mass has only step-wise melodies and unmeasured rhythm. both the melody and rhythm of a motet are more irregular. a mass is always based on a specific text that is part of the liturgy of a given day. a mass is sacred, a motet is secular
One of the main differences between the renaissance mass and a renaissance motet is that the mass is always based on a specific text that is part of the liturgy of a given day. Motet is not connected to some specific text that is part of the liturgy but is also like the mass usually sacred.
In a play or film, subtext is the underlying message being conveyed by a piece of dialogue. Actors must act like investigators to identify the true meaning of their dialogue so that they can play the character's subtextual intention, rather than just recite the lines.