When in the opera Sidious reveals a bit of Sith thinking to Anakin. The most interesting part is the following:

Sidious: "Remember back to your early teachings. All who gain power are afraid to lose it, even the Jedi"
Anakin: "The Jedi use their power for good."
Sidious: "Good is point of view Anakin. The Sith and the Jedi are similar in almost every way, including their quest for greater power"
Anakin: "The Sith rely on their passion for their strength. They think inwards only about themselves."
Sidious: "And the Jedi don't?"
Anakin: "The Jedi are selfless, they only care about others."

At first glance everybody would say that Sidious is clearly wrong here. But is he really? It is obvious the Sith think inward and only about themselves, but are the Jedi really better? The basis of the Jedi way of thinking is the same as with Buddhism in the real world. Real and lasting joy is only found within yourself, not by attaching yourself to anything outward like gaining material things or holding on to love for a person. Jedi have to learn to be happy with themselves without the need for external stimuli. The compassion or unconditional love the Jedi are supposed to have comes forth from this. Since everything is part of the Force, it is important for the Jedi to respect and love everything. What goes around comes around and if one part of a process fails, the entire process will suffer. So you could say the Jedi need the Force to be "balanced" for them to work with it. So everything they do when protecting others, they basically do to protect themselves. To make it a little more "earthly": If you see suffering, why do you feel the need to help? If you dig deep enough you will come to the conclusion that it is because YOU feel better when helping. Helping others is not as selfless as it seems, it is very often done to soothe ones own conscious. Rather selfish if ask me.

This is exactly why the Sith hate the Jedi. They think the Jedi are dogmatic and narrow minded. They feel the Jedi create a fog of lies to cover their quest for their own good, while the Sith are straightforward about it. If your goal is to make your own life better and to reach eternal life in the Force, and if you can reach that goal by doing things your way? Why would you bother to help others while doing so? You are, in the end, only helping them to achieve your own goals. Get over the feeling of guilt and take the faster road. It isn't being more selfish, it is being more realistic. Another point is the way to use the Force. The Jedi flow with the Force, while the Sith just bend it to their will. Why would you take the long way around if you can force your way straight to your goal? The Sith believe in their own inherent strength, while the Jedi believe their strength flows from the Force, they believe themselves to be weak. The Sith take control of their fate, while the Jedi just await what comes to them. Doesn't this make the Jedi seem a little weak and hypocritical?

Sidious was right when he told Anakin: "Good is a point of view Anakin." And he was also right when he said that the Sith and the Jedi are similar in almost every way. Who has the right point of view than? The Sith or the Jedi? I think that not even the wisest can answer that question. We all make choices and if these choices work for us, we are right. In the end, when our moment to go into the Force is at hand, we will know whether or not we did the right thing. Until then, we should just do what we feel is right.

May the Force be with you!