The Immutability of God and of His decrees is frequently insisted upon in Scripture. “I, the Lord, I change not” (Mal. iii. 6). “God is not a man, that he should lie; neither the son of man, that he should repent” (Num. xxiii. 19). “The Strength of Israel will not lie nor repent; for he is not a man, that he should repent” (1 Sam. xv. 29). “And he hath established them for ever and ever: he hath made a decree, and it shall not pass away” (Ps. cxlviii. 6).—This immutability, however, does not interfere with the free-will of man and its consequences. The teaching of the Bible is beautifully expressed in the well-known sentence: ‏תשובה תפלה וצדקה מעבירין את רע הגזרה‎ “Repentance, prayer, and good deeds remove the evil of the divine decree” (Musaf of Rosh ha-shanah); whatever a man has forfeited by evil deeds, he may recover by prayer and improved conduct. This lesson is taught in the Bible on every page, and is illustrated by the history of Israel. For this reason the prophets were sent to the people of Israel to exhort them, and to show them how they could, by means of repentance, ward off the impending catastrophe. To non-Israelites the same mercy was extended, as is shown by the history of the mission of the prophet Jonah.—Mishnah Aboth (iv. 13) therefore declares, “Repentance and good deeds are like a shield against punishment,” ‏תשובה ומעשים טובים כתריס בפני הפרענות‎. The seeming incongruity of the two principles, God’s immutability and man’s hope for mercy and pardon from God, has to some extent occupied the attention of our ancient teachers. “If our condition for a whole year is determined in advance, what is the good of our daily prayers and our supplication for God’s help in times of trouble?” Such is the question asked in the Babylonian Talmud, Rosh ha-shanah (16a), and the answer is given, ‏יפה צעקה קודם גזרה ואחר גזרה‎ “Prayer is of good effect both before the decree and afterwards.” It is always in the power and in the will of the Almighty to accede to our petitions and to fulfil our wishes. The question has since been repeated frequently, but no better solution has as yet been supplied. Abraham, who was the first teacher of monotheism, has also been made by tradition the father of prayer. In the Biblical account he is the first who uttered a prayer; a prayer in the true sense of the word, not for himself, but for his fellow-men. The words of Cain, ‏גדול עוני מנשא‎ “My punishment is greater than I can bear,” have not the character of prayer, nor can the “calling by the name of God” in the age of Enosh be considered with certainty as an expression of prayer. Tradition relates, therefore, that before Abraham there was no one that called God by the name ‏אדון‎ “Lord.” Abraham was the first who recognised God as Lord of man, in whose hand his fate lies,—the condition sine quâ non of prayer. From Abraham onwards prayer remained the chief refuge in danger, and the best, solace and relief in time of trouble.