Some teachers always teach students: "A drop of water wears away a stone, as long as you keep working hard, you will always succeed." However, I don't think this is completely correct.

First of all, they ignored the material of the stone. A stone picked up casually on the ground is easily affected by water, but what if it is a diamond squeezed countless times under the construction site? Of course, it is not easy to have an impact. Even if it has an impact, it is minimal. I don't know how long it will take to see changes, let alone infiltration. Therefore, before overcoming difficulties, people should first see if it is difficult to find a breakthrough, and then think about whether to break through that difficulty.

Secondly, they ignored the thickness of the stone. Suppose it is an ordinary stone: if the stone is thin, as thin as a piece of paper, it is easy to penetrate. This is like asking a top student in Grade One to do "1+ 1=?" Same. However, if it is a very thick stone, it is almost impossible to penetrate. Because water will cut a hole in the stone, as the hole gets deeper and deeper, the water inside will accumulate more and more. At this time, the water drops down again, and when it reaches the bottom, the power of the water drops is basically gone, and the bottom is basically unaffected by the bottom. Therefore, people should also consider whether the problem is too complicated when solving difficulties.

Finally, in addition to some factors of the stone itself, we should also consider some external factors. Like the wind. If the wind is strong, water drops can't drop on the stone at all; Even if the wind is not so strong, the water droplets will be blown away, making it impossible for the water droplets to accurately drop on the stone. Give two figures who are very influenced by wind direction in history, one is Copernicus and the other is Galileo. Copernicus was persecuted by others for proposing Heliocentrism. In the end, although Heliocentrism published it, he himself died. Galileo has always been blocked from making the world agree with his ideas. Therefore, he can prove his ideas to the world through his countless efforts.

To sum up the above points, it shows that "a drop of water may not wear a stone".