Philosophy is basically a study of how we think and behave. Søren Kierkegaard was a Danish philosopher. He wrote about how it's important to live life fully and honestly. He said that we shouldn't try to act like someone else or follow the crowd, we should think for ourselves and make our own decisions. To do this we have to think hard about what is truly important to us and honor our beliefs and ideals. He also thought it was important to pay attention to our feelings and emotions and make sure we take care of ourselves. Kierkegaard's philosophy helped people think differently and be more brave and independent in their choices.