what is caesar's greatest strength and weakness and a cited quote(for each one) from the play to support it?

Pride can be seen as a strength or a weakness. Here Caesar compares himself to the brightest star in the universe. I'm inclined to think this excessive hubris leaves him vulnerable to people that don't think he is a bright star,

"But I am constant as the northern star,

Of whose true-fix'd and resting quality

There is no fellow in the firmament.

The skies are painted with unnumber'd sparks..." Act 3

On a positive note, Caesar does inspire the love of the people including the man that will conspire against him,

Brutus- "I would not, Cassius; yet I love him well." Act 1