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I personally have always found the parallels between many (most) of the major religions fascinating, and these few sayings are just a very small example. Many more parallels in the sayings of these great teachers can be found at the World Peace Page. To read more in the five quotes series, click here.
Jesus: "Do to others as you would have them do to you." Luke 6:31
Buddha: "Consider others as yourself." Dhammapada 10:1
Jesus: "If anyone strikes you on the cheek, offer the other also." Luke 6:29
Buddha: "If anyone should give you a blow with his hand, with a stick, or with a knife, you should abandon any desires and utter no evil words." Majjhima Nikaya 21:6
Jesus: "Truly I tell you, just as you did not do it to one of the least of these, you did not do it to me." Matthew 25:45
Buddha: "If you do not tend to one another, then who is there to tend you? Whoever would tend me, he should tend the sick." Vinaya, Mahavagga 8:26.3
Jesus: "Put your sword back into its place; for all those who take the sword will perish by the sword." Matthew 26:52
Buddha: "Abandoning the taking of life, the ascetic Gautama dwells refraining from taking life, without stick or sword." Digha Nikaya 1:1.8
Jesus: "Those who want to save their life will lose it, and those who lose their life for my sake will save it." Mark 8:35
Buddha: "With the relinquishing of all thought and egotism, the enlightened one is liberated through not clinging." Majjhima Nikaya 72:15