Context
Caesar wakes up in the middle of the night because his wife, Calpurnia, has a nightmare. She dreams of Caesar's statue spouting blood and many lusty Romans bathing their hands in the pool of blood. Caesar is told this dream and seems a little bit intimidated by the thought so he asks his his servant to get the augorors to do a sacrifice to see if he shall go to the Capitol. The results come back with the lion having no heart which states that Caesar shall not go to the Capitol. Decius being smart reinterprets Calpurnia's dream into something that flatters Caesar and therefore Caesar has chosen to go to the Capitol.
Significance
The significance of this passage is to show that Caesar isn't all out to be 'Constant as the North Star' because in this passage he is easily manipulated into going to the Capitol. Also, this characterizes Decius as a smart person because he knows Caesar's weakness and uses that to persuade him to leave is wife.
