The law of cause and effect works on infallible principles. For example, seeds of rice will yield only rice, not barley. Similarly, if a practice is not what leads to enlightenment, how can it yield the fruit of such?
Many people think that if they regularly read scriptures such as the Diamond Sutra, the Thirty-Five Buddhas Repentance Ritual, the Practices and Vows of the Bodhisattva Samantabhadra, the Heart Sutra, etc., they are no doubt Buddhist practitioners. Actually, that may not necessarily be the case. While recitation of sutras is definitely a good thing to do, and the Buddha also praised its merit, motivation still matters greatly. If the motivation is not right, all will be wrong, and vice versa. That is, one can never do wrong with the right kind of motivation.
~ Depicted from Luminous Wisdom Book Series : The Right View - The Three Supreme Methods—the ultimate methods of cultivating virtue and training the mind