By developing a sense of respect for others and a concern for their welfare, we reduce our own selfishness, which is the source of all problems, and enhance our sense of kindness, which is a natural source of goodness.
It is important to understand that counterproducti ve actions of body, speech and mind do not arise of their own accord, but spring up in dependence on our motivation. Faulty states of mind give rise to faulty actions. To control negative physical and verbal actions, we need to tame our minds.
Buddha himself taught different teachings to different people under different circumstances. For some people, there are beliefs based on a Creator. For others, no Creator. The only "definitive truth" for Buddhism is the absolute negation of any one truth as the Definitive Truth.
Delusions are states of mind which, when they arise within our mental continuum, leave us disturbed, confused and unhappy. Therefore, those states of mind which delude or afflict us are called 'delusions.'
So long as space remains, So long sentient beings' suffering remain, I will remain, In order to help, in order to serve... I am nothing but a servant to provide to others. So if you provide some happiness, some comfort to others, then your life becomes meaningful. If your life creates problems or suffering to others, then there's no meaning to your existence.