| Quote #4
The supreme principle of patience is that you have to endure difficulty and not question the hand that fate deals you. If you want to go left and fate decides you should go right, well, you're going right. A "yoke" is an instrument to bring people under submission, in this case to divine justice.
| Quote #5
They also serve who only stand and wait." (line 14)
Not much to say here. This line pretty much defines "patience."