The work of the Lishma

The issue here is trite and I asked him too but I don’t feel a clear answer. In the Torah there is no mention of work for its own sake and there is a theme of love and connection with God. It is true that in the past the Rabbi mentioned that there is a Rambam that love is the intention, since this is true (by the way, where is the Rambam) but it is not simply a biblical statement. It is simply a biblical statement and from the prophets it seems that God demands us because of the covenant of connection and love and that we are His sons and where is the gratitude? The Rabbi’s understanding of the matter sounds like a man who would say to his wife, I am doing you good not because I love you and not because you are beautiful or wise. There are many good things from you but the right thing is to treat you well. Is this a form of normal relationship? In the framed article, the Mishnah that condemns work for its own sake does not refer to external results beyond love, and Chazal spoke of work for love. It does not seem at all that they spoke in the same way that the Rabbi speaks. The Rambam also mentions love for God as love for a woman. Thank you and at night that things are not arranged.