In plain words
This is what you must do today. In the children too you must stir enthusiasm and joy like this; you must not stir despair and dejection. If your own children go astray, how much you suffer! In the same way, will you feel no pain if other people's children go astray? The children born to you are children of desire; all the students are your children of Prema. So, with Prema, you must make them one.