en_tn/luk/12/24.md

Jesus continues to teach his disciples.

ravens

This refers either to 1) crows, a kind of bird that eat mostly grain, or 2) ravens, a kind of bird that eat the flesh of dead animals. Jesus' audience would have considered the ravens worthless because they could not be eaten.

How much more valuable you are than the birds!

This is an exclamation, emphasizing the fact that people are much more valuable to God then birds.

add a cubit to his lifespan

This is a metaphor because a cubit is a measure of length, rather than of time. The image is of a person's life stretched out as if it were a board, a rope, or some other physical object. (See: rc://en/ta/man/translate/figs-metaphor)