I still keep my personal diary, but I haven't written anything there this month, I need to fix that. Keeping a diary is a useful thing for me, so I need to write there every day.
I don't hide my personal diary because I write illegibly and it's unlikely that anyone will understand my notes except me. And if I need to write something secret, I'll encrypt it in decimal code or write in English instead of Russian. O I came up with an even more reliable way! I'll write the text in English, encrypt it in decimal code and write this encrypted message in the diary.