This is how
Assaji Smanera introduced Buddhism to
Upathissa Pririwaji (who became
Sariyuth Rahathn Wahanse)
This means that if there is no cause, there is no effect. So that, if there is no cause for suffering, there is no suffering. Notice that this explains about four noble truth.
Four noble truth
1. Suffering -
First we should know what suffering is. Suffering is what we experience. If something that we don't like, happens we suffers. If something that we like, doesn't happen, we suffers.
2. Understanding why suffering effects -
Suffering is what what we experience / The effect / The result of something. The way of understanding why suffering effects is called
Patichcha Samuppadaya. (Identifying the main cause(s) by going step-by-step backward with causes & effects). Please someone explain it well as I can't remember it all. So explaining
Patichcha Samuppadaya would be very appriciated.
Patichcha Samuppadaya helps to learn how
Loba, Dwesha, Moha cause us to suffer.
3. Understanding how to make no cause for suffering -
Here is the way.
Seela > Samadi > Prakgna. Notice that 8 fold path can be categorized under these 3.
I. Seela is to control yourselves (body & mouth). This can't be skipped because we need control the body before controlling mind.
II. Samadi is to control the mind. In other words, to keep focus on one thing. this keep five precepts deactivated as long as we keep our focus on one thing. This is very important because you can't see the truth about world if you've the five precepts on your mind. However this doen't clean your mind permanently of the
Five Precepts.
III. Prakgna is to break the
Sansara Cycle & stop suffering. Thinking in deep with a open-mind about what we got known in the 2nd of 4 noble truth. We should remove the cause(s) from our mind it's not a deactivation of
Five Precepts. They need to be removed permanently. This step would be completed when practicing with a open-mind. So that's why 2nd step should be done before this.
4. Fouth is to walk the way we understood in 3rd step. (
Seela > Samadi > Prakgna) The person who did it is en-lighted and have broken the
Sansara Cycle and have realized the truth about world.
disclaimer: for information purposes. 
please correct if i've posted something incorrect. 