Taking love as the source means taking love as the starting point, which is mostly used in the education industry, indicating that love is the source of educational strength. The next sentence can be said to nourish life, which means to nourish life like rain. Teachers take love as the source, impart knowledge and enrich students' knowledge. These two sentences echo each other.

Taking love as the source, the next sentence can also be said to be devoted to cultivating talents, retaining each other with love, and cultivating hearts with heart.