I don't believe you really know God if you do not recognize His sense of humor.
Know thyself, or at least keep renewing the acquaintance.
The experience I gained at age 21 would be useful if I were ever 21 again. But I'm 71 and new at it and keep making age 71 mistakes.
There are days when I'm alone with my thoughts, which is to say, not alone enough.
There is no expert on what happiness is but many on what it might have been.
It is easy to mistake being ready for a wedding with being ready for marriage.