Why all things are inter-related?

Life is a chain. All things are related. When any link is disturbed, the other links will be affected. We should think of the environment as our mother—Mother soil, Mother Sea, Mother Earth. There is no crime worse than harming one's mother.

Buddhism Day by Day
Wisdom for Modern Life by Daisaku Ikeda 13/11

Do not forget your mother's love

Please do not forget your mother's love or the hardships she has endured for you. I am convinced that while people keep the memory of their mothers' loving faces alive in their mind, they will never go far astray. Similarly, as long as we bear in mind the Daishonin's profound compassion and live in deep appreciation of it, our lives will be illuminated brightly by the light of Buddhahood. And enveloped in the Gohonzon's great compassion, we will walk along a path that is filled with tranquillity and immeasurable joy. 25/11