Different types of bowing. Bowing in Modim in Amidah. Making mistakes during Tefila as a bad omen. Different statements of Rebi Chiya bar Aba in the name of Rebi Yochanan describing the reward the profits speak about including Mashiach and Olam Haba. The power of Tefila of Rebi Chanina Ben Dosa. Davening in a place of windows but not in open area. A person who is not shameful of one's sins.