Question: What does it mean to act solely for the sake of the Creator? It greatly disturbs me since it feels as if I am forced to slave away for someone.
Answer: This "someone" is the absolute law of Nature, the unifying force that contains the entire creation and you in it. Beside this law, there is nothing else! And when you "bestow," you do it not "for somebody's sake," but in order to establish this law over all creation so that it is revealed to all.
The Creator doesn't need it, He doesn't receive anything; He is the desire to bestow, which cannot receive. He Himself is not perceived within you; rather, what you perceive is your own impressions of Him. The law of bestowal is similar to a wall: It feels nothing, you may consider it to be still. This law of nature is the absolute law of bestowal, which you experience reactions to within yourself.
You don't do Him favors! He doesn't require that you cleave to Him and love Him; He doesn't feel our work as we do. We can't even discuss His essence for it is unknowable. Everything we discuss about Him is our personal impressions, our perceptions of Him in our broken or corrected desires. Therefore, I can't say that I am working for Him. Expressions "cleave to the Creator" or "love your Creator" speak about me and my correction, after which I will attain love.
That is why we were given a group, in relation to which we have to work, instead of working with some abstract principle or a force that cannot be sensed or with the factor that everyone can turn as he pleases. Take, for instance, the science of Kabbalah. It is a program of how you should treat human society. Build your attitude to it according with this program and by doing so, you will reach your full correction.
Love for the created beings that you will experience with the help of the Light that Reforms will be your attitude to the Creator indeed. Instead of acting in relation to the Light that cannot be perceived, the soul broke apart, and its parts now interact with each other instead of interacting with the Light. Therefore, they have an opportunity to connect with each other, act, and examine things together, which they cannot accomplish if paired with the abstract force.
Laitman.com Post: Why Do I Labor And What Do I Find?