In plain words
We must not come forward to criticise the bad in others or the wickedness of others. Reviling others is a great sin. This sin of reviling others is a great disease. It is a disease for which there is no cure of any kind. There is no medicine for it.
Reviling others is just like the disease cancer. We must not criticise, revile, mock or dishonour anyone at all, in anyone's affairs at all. By reviling others we sink into many kinds of evil intentions.
Pushing reviling and violence far away, making the thought of God abundant in oneself, if one looks on people with Prema, the Prema of God will be one's own in plenty.
So we must try to push reviling and harming others far away.
As much as you abuse others, so much the fruit of sin comes to you; it never leaves you, anywhere in the world; the other is not an other; he is the Paramātma, my friend; this is the true path, the word of Sai.
Calling someone ‘an other, an enemy to me,’ we revile whoever it is just as we please. But he is not an other. He is the Paramātma. So in human beings there must be no room at all in the heart for the evil feeling of hating one another. Only because Ahaṅkāra has grown, only because they have grown their pomp, do they look on others as outsiders. No, no. Every being that stands before you is the very embodiment of the Paramātma. He alone is the Leader of the whole world. He is the One who holds the strings, and the One who plays the part as well. If any person comes before you and reviles you, you, smiling: Aha! The Paramātma has come in that form and is criticising this form. All forms are His. So the one who reviles is He Himself. The one who is reviled is He Himself too. Many people fall prey to many kinds of sorrows. But, “Alas, I am worshipping God, I am praying to God; when will these sorrows, troubles and injustices go far from me? God is failing to free me from these sufferings!” So human beings grieve. This is a great mistake. Sorrows have no eyes, nose, legs or hands. Worldly cares have none of these limbs. These sorrows are things we dislike, things uninvited. What use is there in our grieving over this? These sorrows are only illusions, not objects that have come to you in fact.