Ok, I'll give it a try: A person who enjoys a life of solitude also endures a life of loneliness. or One who has a life of solitude also has a life of loneliness . I translated 『日子』 as a person's life, instead of as a day. Is this correct? If I made errors please let me know!!!

哈哈，dark panther 再给你赞一个！ 很棒。 我也试一下： One who enjoys a life of solitude must also edure the loneliness it brings To live a life of solitude is to edure a life of loneliness 但我比较喜欢你提的第一个回答。 支持！

Day to enjoy the solitude of a person to endure loneliness

我想這樣說： alone in lonely，enjoying the solitude.

One day alone is enjoyed alone and endured alone.