>>>I like Lisp and always wanted to deepen my knowledge in it, but I just want to get my job done.
Discovery of knowledge is done by the people with love of knowledge. Each language brings its philosophy. You just like the philosophy. The objects doesn't matter much. You might have been working in Lisp for long time and you cannot learn anything new quickly. It might take time for you and you like to become the master of the domain rather than jack of all trades.
Take anything for its applications rather than sheer love for it. Just think, what are the things, that you cannot accomplish because of hanging to lisp and you would have answered yourself for the detachment, if those other things, really have values in your life.