None of these three religions has a God.

"grant me the courage to change the things I can, the serenity to accept the things I can't change, and the wisdom to know the difference" is a summary of the Tao religion. The Yin-Yang symbol is part of the Tao religion, there is light within dark and dark within light, light follows dark and dark follows light.

You've heard the expression "wouldn't hurt a fly". That's the Jain religion. A moral stance of "do no harm". Environmentalism. A devout Jain is vegetarian, will not wear colours made from animals or plants. A Jain cannot be a commercial farmer, because commercial farming involves killing pests. The Hippie culture of "make love not war" is part of Jain.

Business ethics is Confucius. Make as much money as you can, but do so in a completely ethical way. Kindness to strangers, financially support parents in their old age, be good to staff, don't lie or cheat. Confucius is the only religion I know where kindness to shareholders is part of the religion.