As the lion's roar forces every one to fear, so the Divine call of the prophet forces him to speak (Jeremiah 20:9; Ezekiel 2:8; 1 Corinthians 9:16, etc.). St. Gregory, moralizing, takes the lion in a spiritual sense: "After the power of his Creator has been made known to him, the strength of his adversary ought not to be concealed from him, in order that he might submit himself the more humbly to his defender, the more accurately he had learned the wickedness of his enemy, and might more ardently seek his Creator, the more terrible he found the enemy to be whom he had to avoid.
For it is certain that he who less understands the danger he has escaped, loves his deliverer has; and that he who considers the strength of his adversary to be feeble, regards the solace of his defender as worthless" ('Moral.
,' 32:14). Of course, this exposition does not regard the context.