We do not worship the Buddha, we respect him as a teacher. His teachings enable us to leave suffering and attain happiness.
Complete understanding is when one realizes the truth about life and the universe.
It is when one is apart from all delusions. Cultivation is practiced in our everyday life. We should not see it as something unusual, it is simply changing our-selves for the better. To keep our mind pure and at peace is like keeping a pond clean and undisturbed. When the water is clear and still, it can reflect the sky, sun, and trees just as they are, without distortion.