When young we have a vivid sense of basic values like trust and warm-heartedness, which we tend to neglect in today's competitive world as we grow up, yet from birth we all have a need for affection. The emotions we experience today have not changed much over the last few thousand years, but the interest increasing numbers of people are showing in their inner world and how their emotions work is a sign of maturity.
The Buddha taught some people the teachings of duality that help them avoid sin and acquire spiritual merit. To others he taught non-duality, that some find profoundly frightening.
Just as a mother would protect with her life her own son, her only son, so one should cultivate an unbounded mind towards all beings, and loving-kindness towards all the world. One should cultivate an unbounded mind, above and below and across, without obstruction, without enmity, without rivalry. Standing, or going, or seated, or lying down, as long as one is free from drowsiness, one should practice this mindfulness. This, they say, is the holy state here.
If there is no other world and there is no fruit and ripening of actions well done or ill done, then here and now in this life I shall be free from hostility, affliction, and anxiety, and I shall live happily.
A priest once quoted to me the Roman saying that a religion is dead when the priests laugh at each other across the altar. I always laugh at the altar, be it Christian, Hindu, or Buddhist, because real religion is the transformation of anxiety into laughter.