Some people argue that because they cannot pray rightly, it is better for them not to pray at all. They draw support from Scripture verses that describe the prayers and worship of sinners as a stench in God’s nostrils and an abomination in His sight. They say that God will not hear sinners and that whatever is not of faith is sin. The first part of this argument—that we cannot pray rightly—is true, but the conclusion that it is then better not to pray at all is false… This type of argument, which sounds pious, is really an irreligious excuse and a perversion of the gospel message… Psalm 130:3–4 encourages the guilty who cannot stand before God to come to Him: “If thou, LORD, shouldest mark iniquities, O Lord, who shall stand? But there is forgiveness with thee, that thou mayest be feared.”
Joel Beeke, Who Should Pray?
Semper Reformanda 