I would like to say something about effort. Here there are two extremes that we need to avoid. One is trying too hard. The other is not trying at all. There are some very beautiful similes used in this connection in the texts. During the Buddha’s time there was a monk who was trying very hard in walking meditation so that even the bottom of his feet were bleeding. When the Buddha spoke to him, the Buddha realised that he was a musician. He used to play a lute, which is a stringed instrument. So the Buddha asked him: Now when playing a musical instrument if the strings are too loose or too tight, the music will not be right. So the Buddha said that effort also should not be too loose and it should not be too tight. This is what is called right effort.
Another simile the Buddha gave is that when you want to catch a small bird, if you grasp the bird too tightly you might kill the bird in the process, and if you grasp it in too loose a way the bird might escape. So in this way right effort can also be called effortless effort.