....................WHEN?!?
Answer: He is not a leader
Explanation: Antony believes that Lepidus should not rule with him and Octavius because to him, Lepidus is only a follower, not a leader. He is not worthy of being part of the triumvirate. Antony only sees Lepidus as the errand boy, not someone worthy of leading with him and Octavius. He even compares him to a horse, which is also only a follower.
What was his name Edgar Allen Poe? He rights dark stuff.
He would give in if you showed any sign of weakness.
The reason of this answer, the fact that he would give in if you showed any sign of weekness, shows how kind hearted he is.