I suppose everyone has heard that saying. Many, many years ago I believed that. I was in the Navy and in Japan. I had a romantic relationship with a Japanese woman. I thought of marrying her but the red tape of the Navy was a great obstruction. When I returned to the States and was discharged we continued to write letters. I researched the possibilities for bringing her to the States. As time passed the letters became fewer and longer apart. Eventually we stopped writing. At the time I was sad  but in retrospect I think, for me, the saying should be reworded to (.... the mind grow wiser). If I had married her, it might have turned out well but, I would have not met the woman who became my loving wife for 52 years. I suppose many of the people on this board had a romantic experience that made a lasting positive influence on their life. I'm equally sure there were a lot of negative experiences 8>(.  
Now I believe the original saying again!!!