This sentence is a bit exaggerated, because the actual situation is that a seed can't grow a forest. But the purpose of this sentence is to emphasize the power and potential of seeds through exaggeration. Seeds are the origin of plants, which contain all the genetic information and energy of plants and can germinate and grow into a plant. Although a seed can't grow into a forest, it can grow into a big tree, thus contributing to the formation of the forest.

In fact, in order to grow a forest, we need a lot of seeds, suitable soil, plenty of sunshine and water. Seed is only one link in the forest, and it needs the cooperation of other links to realize the formation of the forest.

In real life, we can understand this exaggerated sentence as an encouraging and inspirational way. It reminds us that everyone has his own potential and ability. As long as he makes efforts and provides suitable environment and conditions, he can realize his own growth and development.

Therefore, although this exaggerated statement is somewhat exaggerated in language, it conveys a positive message, encouraging people to discover their potential and strive to achieve their goals.