Jesus continues to speak about the lilies as if they were people who wore clothes. The lilies being clothed is a metaphor for the plants having beautiful and colorful flowers. (See: [[rc://en/ta/man/translate/figs-personification]] and [[rc://en/ta/man/translate/figs-metaphor]])
The Jews at that time used grass in their fires to cook their food. This can be stated in active form. Alternate translation: "someone throws it into a fire" or "someone burns it" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Jesus uses this question to teach the people that God will provide what they need. Alternate translation: "he will certainly clothe you ... faith." (See: [[rc://en/ta/man/translate/figs-rquestion]])