Very often pessimistic people speak against their own desire. They want to undertake some work, and they say, 'I will do this, but I don't think I shall succeed in it.' Thus they hinder themselves in their path. Man does not know that every thought makes an impression on the consciousness and on the rhythm with which the consciousness is working. According to that rhythm that reflection will come true and happen; and a man proves to be his own enemy by his ignorance of these things.
Hazrat Inayat KhanIn Sufi terms the crushing of the ego is called Nafs Kushi. And how do we crush it? We crush it by sometimes taking ourselves to task. When the self says, 'O no, I must not be treated like this,' then we say, 'What does it matter?' When the self says, 'He ought to have done this, she ought to have said that,' we say, 'What does it matter, either this way or that way? Every person is what he is; you cannot change him, but you can change yourself.' That is the crushing. ... It is only in this way that we can crush our ego.
Hazrat Inayat KhanThe more sincerity is developed, the greater share of truth you will have. And however much sincerity a person may have, there is always a gap to fill, for we live in the midst of falsehood, and we are always apt to be carried away by this world of falsehood. Therefore we must never think we are sincere enough, and we must always be on our guard against influences which may carry us away from that sincerity which is the bridge between ourselves and our ideal. No study, no meditation is more helpful than sincerity itself.
Hazrat Inayat Khan