It is very evident from this inward control which you feel enlightening and guiding you and the resolution of truth-speaking that it made you take, that your psychic being is awake within you.
The fault of character of which you speak is common and almost universal in human nature. The impulse to speak what is untrue or at least to exaggerate or understate or twist the truth so as to flatter one’s own vanity, preferences, wishes or to get some advantage or secure something desired is very general. But one must learn to speak the truth alone if one is to succeed truly in changing the nature.
To become conscious of what is to be changed in the nature is the first step towards changing it. But one must observe these things without being despondent or thinking “it is hopeless” or “I cannot change”. You do right to be confident that the change will come. For nothing is impossible in the nature if the psychic being is awake and leading you with the Mother’s consciousness and force behind it and working in you. This is now happening. Be sure that all will be done.
Ref: Letters on Yoga – IV