What is oneness of all existence?

It is that approach in which one is mindful of one’s own connection with the rest of existence – mindful of one’s own happiness and the happiness of all beings.

Calm Abiding is designed as an exercise in meditation that will enable the reader, through conscientious practice, achieve a sense of abiding calm within themselves.

Calm Abiding uses techniques and strategies from world faiths (including Hinduism, Buddhism and Christianity) and the secular tradition of positive thinking.

And common sense too.