St. Ignatius (Brianchaninov) writes that
"Humility does not see itself humble.
On the contrary, it sees in itself a lot of pride.
It takes care to find all its branches; looking for them,
It sees that there is still a lot to look for."

St. Paisios of the Holy Mountain says that
"A man who considers himself a saint and prays for others,
Considering them sinners, is disgusting to God".

St. Anthony (Putilov) of Optina writes in his diary that
"I saw that only then I was in a true opinion of myself
When I had a bad thought about myself;
And when I had a good thought I was in delusion".