She is beautiful like a flower.

This flower is as beautiful as a plum blossom.

It's better for him not to know the truth. After all, ignorance is bliss.

He knows that pain through his own experience.

He is feigning ignorance about that problem.

In order to understand his feelings, I had a deep conversation with him.

God only knows what he is thinking.

I have no way of knowing what he is thinking.

He is working hard to make his abilities known to the world.

The greenhouse effect is causing the earth's temperature to rise.