Seek out knowledge , Understand oneself & one's environment & purpose in life , Live a meaningful existence with fewer regrets or sorrowful moments along the way .

In this hadith, the Prophet Muhammad (s.a.w) is teaching us about the importance of knowledge and how it can affect our emotions and behavior in life. He says that if we knew what he knows, then we would laugh less and cry more because of how much wisdom we would gain from his teachings and understanding of life's realities. This hadith encourages us to seek out knowledge in order to better understand ourselves, our environment, and our purpose in life so that we can live a meaningful existence with fewer regrets or sorrowful moments along the way.