What does it mean to be a heartless god?

The meaning of this sentence is that the gods and buddhas all over the sky will not be merciful because of your pain. There is no soft-hearted god in the world.

You will encounter a lot of pain and helplessness when you are alive. You can't expect anyone to help you, and you can't trust the Buddha to help you through your sufferings.

In the face of difficulties, we can only head on, overcome and sprint hard. Perhaps, paying may not necessarily succeed. However, you can't stop wasting your life. Then it will definitely not succeed.

So when faced with difficulties, don't beg for mercy from the gods. We can only overcome it by ourselves, get out of the predicament and get out of a world by ourselves.