Master Yoda: A Jedi's strength flows from the Force. But beware of the dark side. Anger, fear, aggression... The dark side of the Force are they. Easily they flow, quick to join you in a fight. If once you start down the dark path... forever will it dominate your destiny. Consume you it will, as it did Obi-Wan's apprentice.
Yoda: Master Kenobi, wait a moment. In your solitude on Tatooine, training I have for you.
Obi-Wan Kenobi: Training?
Yoda: An old friend has learned the path to immortality. One who has returned from the netherworld of the Force. Your old master.
Obi-Wan Kenobi: Qui-Gon?
Yoda: How to commune with him I will teach you.
Yoda: Destroy the Sith we must.
Obi-Wan Kenobi: Send me to kill the emperor. I will not kill Anakin.
Yoda: To fight this Lord Sidious, strong enough you are not.
Obi-Wan Kenobi: He is like my brother. I cannot do it.
Yoda: Twisted by the dark side young Skywalker has become. The boy you trained, gone he is. Consumed by Darth Vader.
Yoda: Careful you must be when sensing the future, Anakin. The fear of loss is a path to the dark side.
Anakin Skywalker: I won't let these visions come true, Master Yoda.
Yoda: Death is a natural part of life. Rejoice for those around you who transform into the Force. Mourn them, do not. Miss them, do not. Attachment leads to jealousy. The shadow of greed that is.
Anakin Skywalker: What must I do, Master Yoda?
Yoda: Train yourself to let go... of everything you fear to lose.