It means: when we act out of the motive of benefiting others, just like flowers emit fragrance, butterflies will naturally attract us.

Empathy, butterflies will come when flowers bloom. This sentence expresses the importance of altruism, emphasizing that when we act out of the motivation of helping, caring and caring for others, it will naturally attract others' attention and response. When we pay attention to the needs and happiness of others, we will also get the attention and appreciation of others, just as flowers emit fragrance and attract butterflies.