How to understand "Strictness is great love, small kindness is thought of big evil, great kindness is thought of ruthlessness"

Strictness is great love. Being strict with others is also strict with yourself. Later it evolved into law, because the law is fair to everyone and treats everyone the same. Love, so it is called great love. Small kindnesses and big evils, because you give small kindnesses to others, hoping in your heart that others will repay you, but most of them will not repay you. If you encounter too many, you will become resentful. They will retaliate against others, which is evil.

Great kindness is ruthless, because it wants to save most people at the expense of a small number of people, and the decision-maker is a great good person. No matter how innocent a small number of people are, they will still die. This is heartless.