That quote is quite interesting.
I went to see if it's any different in other versions is bible, but it's always pretty much the same.
Maybe expressing that you're fasting could be seen as bad. As if you're trying to boast about it, how you're better then others.
Which made me that, if people that eat a vegan diet (or similar) kept it to themselves and not force it onto others, then perhaps there wouldn't exist the culture of "I ate a steak in front of vegans" or "I don't mind if you're vegan, but please let me eat in peace".
The first part Matthew 6, 1 - 21 has a lot more about doing what we do only with the expectation that God will see it, either it is alms, prayers or fast.
Each of these might have value on their own, but God will only reward us if we do it for him instead of doing it to seek the glory of men.
Maybe expressing that you're fasting could be seen as bad. As if you're trying to boast about it, how you're better then others.
Which made me that, if people that eat a vegan diet (or similar) kept it to themselves and not force it onto others, then perhaps there wouldn't exist the culture of "I ate a steak in front of vegans" or "I don't mind if you're vegan, but please let me eat in peace".