5.) Po's Wu Wei: In his fight against Tai Lung at the end of the first film, Po takes a hard hit from his Snow Leopard nemesis, and through ripples of undulating flab returns a devastating strike that sends Tai Lung flying. While I wouldn't recommend one try it at home as demonstrated in animated form, the idea of not resisting, but rather redirecting forces is an old school approach. It also reflects the ancient Taoist wisdom of wu wei, effortless action.
4.) "But I realized having you in Po's life doesn't mean less for me. It means more for Po." In the third movie, there's a scene in which Mr. Ping (Po's avian dad by adoption) explains to Po's panda dad, Li, how he came to grips with Li's presence (which at first made Mr. Ping insecure and envious.) The lesson is to be careful in assigning a situation zero-sum status (one person's gain requires another's loss) without having reason to believe it reflects the reality of the situation.
3.) "There is just news. There is no good or bad." This bit reflects an old Taoist story about a farmer and his neighbor. One day the neighbor sees the farmer has a beautiful new horse. The farmer tells the neighbor that it's a wild horse that the farmer found at the back of his property. The neighbor says, "That's good news." The farmer says, "Good news? Bad news? Who's to say?" The next day when the neighbor stops by the farmer tells him how his son got a broken arm trying to break in the wild horse. "That's bad news," says the neighbor. "Good news? Bad news? Who's to say?" The next day the army comes by, conscripting young men, but the farmer's son is not forced to go to war because the young man has a broken arm. The story goes on like that.
2.) "If you only do what you can do, you'll never be more than you are." In the third movie, after Master Shifu explains to Po how he knew that Po would fail on his first day as a teacher, the Master utters this bit of wisdom. It's a warning to avoid loitering in one's comfort zone.
1.) "The secret ingredient of my secret ingredient soup.... The secret ingredient is ... nothing... To make something special you just have to believe it's special.": For some reason, people love to get attached to trappings and secret wisdom, even to the point of losing sight of what's important.
It reminds me of a story about Dr. Herbert Benson. Benson famously wrote a book entitled, "The Relaxation Response" about the effects of relaxation on health. Back in the sixties, students of the Maharishi Mahesh Yogi (famously, the Beatles' guru) asked Benson to do a study of the health effects of their teacher's system of meditation. The Maharishi taught transcendental meditation, an approach in which students focused on mentally repeating a mantra that is "given" to them personally by the teacher. (I put the word "given" in quotes because the Maharishi actually charged a significant amount of money for these mantras.) Anyhow, after much badgering, Benson agreed to do the study. One has to realize that, while today such a study would be considered quite respectable, in those days a study of the effect of meditation on health would have been akin to a study of voodoo.
So, Benson conducted the study and - lo and behold - he found that patients who practice meditation do have better recoveries and less ill effects. The Maharishi and his people now love Herbert Benson. They sing his praises. But Benson is interested in science and couldn't care less whether any particular guru's system of meditation is validated. So he repeats the study with all participants using the word "one" as their mantra, and he gets the same result. Subsequently, other forms of meditation are studied, and with similar outcomes. Needless to say, the transcendentalists love affair with Dr. Benson was short-lived.