en_tn/ecc/03/18.md

I said in my heart

Here the author refers to himself by his "heart" to emphasize his feelings. AT: "I said to myself" (See: rc://en/ta/man/translate/figs-synecdoche)

they are like animals

Here the author says that human beings are like animals. In the next verse the author explains clearly how humans are like animals. (See: rc://en/ta/man/translate/figs-simile)