To have knowledge in the intellect is to be constantly cheerful. When something negative happens, we find that there are only negative or waste thoughts about the situation or people. We try hard not to think about it but we find only those thoughts coming to our mind. With such thoughts the situation seems worse than it is and we find it difficult to remain cheerful. In such situations instead of trying to cut out waste we need to give ourselves something positive to think about. When the intellect is busy thinking about the positive, there'll be no room for negativity. In this way we will be able to remain constantly cheerful even in the most negative situations.
~ Brahma Kumaris, Mt Abu