Tamāla Kṛṣṇa: "As the Vedas are eternal, so this truth of Kṛṣṇa consciousness is also eternal. One should have firm faith in this injunction without envying the Lord. There are many so-called philosophers who write comment on the Bhagavad-gītā but have no faith in Kṛṣṇa. They will never be liberated from the bondage of fruitive action. But an ordinary man with firm faith in the eternal injunctions of the Lord, even though unable to execute such orders, becomes liberated from the bondage of the law of karma.
"In the beginning of Kṛṣṇa consciousness, one may not fully discharge the injunctions of the Lord. But because one is not resentful of this principle and works sincerely, without consideration of defeat and hopelessness, he will surely be promoted to the stage of pure Kṛṣṇa consciousness."
Prabhupāda: Yes. In the beginning there may be some failures. That is quite natural. Just a child is trying to stand, he may fall down. But that does not mean he should give up the idea. Go on. A time will come when he will be perfect. So we should not give up this business to try to serve the Supreme. May be imperfect in the beginning, but stick to it, and a time will come when you'll be perfect, Kṛṣṇa conscious.