Am I a true believer?

From Martyn Lloyd-Jones devotional.

Picture of a true believer
... he faces the whole of [the teaching of the Sermon on the Mount]. He does not pick and choose, he allows every part of the Bible to speak to him. He is not impatient. He takes time to read it, he does not rush to a few favourite Psalms and use them as a kind of hypnotic when he cannot sleep at night; he allows the whole Word to examine him and to search him. Far from resenting this searching, he welcomes it. He knows it is good for him, so he does not object to the pain ... the true Christian humbles himself under the Word. He agrees that what it says of him is true. Indeed, he says, 'it has not said enough about me'. He does not resent its criticism, nor that of other people, but rather he says to himself, 'They do not say the half, they do not know me' ... He immediately conforms to the Beatitudes because of the effect of the Word upon him, and then, because of that, he desires to conform to the type and pattern set before him. Here is a very good test. Would you like to live the Sermon on the Mount? Is that your true desire? Is that your ambition? If it is, it is a very good and healthy sign. Any man who desires to live this type and kind of life is a Christian. He hungers and thirsts after righteousness; that is the big thing in his life. He is not content with what he is. He says, 'O that I might be like the saints I have read about, like Hudson Taylor, or Brainerd, or Calvin. If only I were like the men who lived in caves and dens and sacrificed and suffered everything for His sake. If only I were like Paul. O that I were more like my blessed Lord Himself.' The man who can say that honestly is a man who is building on the rock. He is conforming to the Beatitudes. Observe the nature of the test. It is not asking whether you are sinless or perfect; it is asking what you would like to be, what you desire to be.

Studies in the Sermon on the Mount, ii, pp. 312-13