In life, what you seek for will come seeking you. What you put out into the Universe, will be provided back to you. What you echo into the vastness, will come rippling back to you. So, if you want more joy in life, if you seek it, it will seek you. If you want sadness in life, sadness will come seeking you. Everything that you projected out into the Universe, is what comes looking for you.
It is like sending a signal out to the Universe to say, "This is what I want to experience, please bring these things in my life so I can experience X emotion."