Constant self-depreciation does not help

It is only this habit of the nature – self-worrying and harping on the sense of deficiency – that prevents you from being quiet. If you threw that out, it would be easy to be quiet. Humility is needful, but constant self-depreciation does not help; excessive self-esteem and self-depreciation are both wrong attitudes. To recognise any defects without exaggerating them is useful but, once recognised, it is no good dwelling on them always; you must have the confidence that the Divine Force can change everything and you must let the Force work.

Ref: Letters on Yoga Vol. I