"When the poor have cried, Caesar hath wept" (3.2.64). This is explaining how when the poor cried Caesar also cried because he felt bad for them and wanted to help them.
"Bear with me; My heart is in the coffin there with Caesar..." (3.2.64). When Antony is saying this he is explaining his love for his friend. He is explaining the deep sorrow he is facing due to the loss of his friend. He is trying to strike compassion to persuade the citizens to feel the same as he does.
"I thrice presented him a kingly crown, Which he did not thrice refuse: was this ambition? Yet Brutus says he was ambitious;..." (3.2.64). Here when saying this, Antony is contradicting what Brutus has said. He does it nicely and sly but takes away Brutus' credibility.