Love is that emotional entity that can propel humanity to great leaps and bounds.
Loving person always succeeds in life.
That’s why Prabhu Yeshu said that Greatest Commandment of God is Love. And Buddha also taught the principles of Compassion and Love.
The great Sage is the one who spreads Love and Compassion everywhere and in everything.
So the top most moral principle is Love and Compassion towards everything.