He who discommendeth others obliquely commendeth himself.

Whatever else he may do, a critic reveals and criticises himself.

Praise in public; criticize in private.

Criticize in private, praise in public.

praise publicly, but criticize privately.

Then, all censure of a man's self is oblique praise.

Only fools imply compliments. The wise man comes right out with it, point-blank. Imply criticism — unless the criticized isn't within earshot.

If you’re blaming the people from your past, then you’re implicitly criticizing who you are today.

All censure of a man's self is oblique praise. It is in order to shew how much he can spare.

One criticizes in others what one recognizes and despises in oneself. For example, an artist who is revolted by another’s ambitiousness.

if you are not careful, you can become what you criticize

"Many people begin their criticism with sincere praise followed by the word "but", which signals that the criticism is about to begin. This may make the listener questions the sincerity of the praise. Use "and" instead, and provide constructive advice rather than criticism. this is possibly the most effective ways to address an issue in written form without seeming false in your praise."

You do ill if you praise, and still worse if you reprove in a matter you do not understand.

If you are praised by others, be skeptical of yourself.