DEUT365 He who trusts in God has peace of mind and tranquility of soul ... A person’s trust in God will enable him to turn his heart away from worldly concerns and devote it wholly to the ways of His service. Then, in his tranquility of soul, peace of mind, and diminished anxiety, he will be like the alchemist-- one who knows how to turn silver into gold, and copper and tin into silver, through science and skill. Moreover, he surpasses him in ten respects. 1. The alchemist needs for his work certain materials, without which he cannot accomplish anything; and these materials are not available at all times and in all places. But one who trusts in God is assured of his sustenance by any one of the means available in the world, as it says in Scripture: “In order to teach you that not on bread alone can man live; rather, man can live on anything that proceeds out of the mouth of God” (Devarim 8:3). For at no time and in no place are the means of obtaining his livelihood withheld from him, as you know from the story of Eliyahu and the ravens (Melachim 1, 17:3-6); the widow [from Tzarfas] (ibid. 17:9ff.); the cake baked on coals and the cruse of water (ibid. 19:6); and the account of the prophets and Ovadyahu, who said: “I hid a hundred of God's prophets, fifty to a cave; and I provided them with bread and water (ibid. 18:13). It is also said: “Young lions are poor and hungry, but those who seek God lack nothing that is good” (Tehillim 34:11); “Fear God, you His consecrated ones, for those who fear Him lack nothing” (ibid. 34:10).