Question

These quotes are from the tragedy of Julius Caesar. I need help with the context and analysis.
'' And for mark antony, think not of him. for he can do no more than caesar's arm when caesar's head is cut off''.

' and so near will I be that your best friends shall wish I had been further''

'' not that I loved caesar less, but that I loved rome more''

'' O Julius caesar, thou are mighty yet''

'' caesar, now be still. I killed not thee with half so good a will.''