When Jehovah first spoke to him, Jeremiah tried to beg off. From this, we see that the boldness and firmness he went on to show were not inherent in him.
لَمَّا تَكَلَّمَ يَهْوَهُ مَعَ إِرْمِيَا ،‏ حَاوَلَ هذَا ٱلْأَخِيرُ أَنْ يَسْتَعْفِيَ فِي ٱلْبِدَايَةِ .‏