But before we explain the Lord's Prayer part by part, it is most necessary first to exhort and incite people to prayer, as Christ and the apostles also have done. And the first matter is to know that it is our duty to pray because of God's commandment. For thus we heard in the Second Commandment: Thou shalt not take the name of the lord, thy God, in vain, that we are there required to praise that holy name, and call upon it in every need, or to pray. For to call upon the name of God is nothing else than to pray. Prayer is therefore as strictly and earnestly commanded as all other commandments: to have no other God, not to kill, not to steal, etc. Let no one think that it is all the same whether he pray or not, as vulgar people do, who grope in such delusion and ask Why should I pray? Who knows whether God heeds or will hear my prayer? If I do not pray, some one else will. And thus they fall into the habit of never praying, and frame a pretext, as though we taught that there is no duty or need of prayer, because we reject false and hypocritical prayers. But this is true indeed that such prayers as have been offered hitherto when men were babbling and bawling in the churches were no prayers. For such external matters, when they are properly observed, may be a good exercise for young children, scholars, and simple persons, and may be called singing or reading, but not really praying. But praying, as the Second Commandment teaches, is to call upon God in every need. This He requires of us, and has not left it to our choice. But it is our duty and obligation to pray if we would be Christians, as much as it is our duty and obligation to obey our parents and the government; for by calling upon it and praying the name of God is honored and profitably employed. This you must note above all things, that thereby you may silence and repel such thoughts as would keep and deter us from prayer. For just as it would be idle for a son to say to his father, "Of what advantage is my obedience? I will go and do what I can; it is all the same"; but there stands the commandment, Thou shalt and must do it, so also here it is not left to my will to do it or leave it undone, but prayer shall and must be offered at the risk of God's wrath and displeasure.