Answer: He tries all the time to maintain a sense of mutual guarantee so that his friends feel no lack of anything, so that they strengthen the mutual intention to bestow, do not forget about this, and do not abandon efforts for a moment. Then, they will also affect him, and the feeling of the importance of the goal and the warmth of the hearts will reign between them.
That is what concerns a person. The thoughts about the friends are more effective than the thoughts about oneself. Caring about personal advancement will bring only little correction, induced by fear and other external calculations. On the other hand, if one invests efforts in others, he or she certainly holds the true course.
Thoughts, intentions, and calculations not aimed at the connection with the group, at the unity with friends, are directed past spirituality. They do not attract the Light that Reforms. The important thing is only what you intend to do in the group. If you care about cohesion of friends, about their future, this is the spiritual work which will bear fruit, and everything else except this will not.
Hillel gave a short definition: “What is hateful to you, do not do to another.” In other words, you have nothing else to think of in your life but how not to hurt a friend. This is enough for your egoism for the time being. Try to correct yourself so that in every moment, in each revealed desire, you think only about how not to hurt a friend.
Do this, and you will succeed: When you will desire to act without hurting a friend, a good attitude towards him will be suddenly revealed to you.
From the 5th part of the Daily Kabbalah Lesson 7/10/2011, “Matan Torah (The Giving of the Torah)”