Cain was a husbandman, who tilled the ground; Abel was a shepherd, who kept sheep. One day each offered a sacrifice to God. Cain brought fruit, and Abel brought a lamb. God accepted Abel's offering, but not Cain's. Why? Well, I am not quite sure, but I think it was because Abel offered his sacrifice according as God had commanded, and had faith in a promised Saviour; but Cain simply acknowledged God's goodness in giving him the fruits of the earth. God had probably told them, too, that when they came to worship Him, they were to bring a lamb or a kid as a sacrifice for their sins; this Abel had done, but Cain had not. Cain was angry because God had accepted Abel's offering and not his; and he hated his brother Abel. God knew the evil thought Cain had towards his brother, and asked him, "Why art thou wroth?" and said, "If thou doest well, shalt thou not be accepted?" But Cain did still more wickedly. When out in the field he killed his brother. Was it not a cruel deed? They were alone when this murder was committed, yet one eye saw it all. God saw it, and said to Cain: "Where is Abel, thy brother?" We cannot sin without God knowing it! Cain told God a lie. He answered, "I know not." But he did know. God was angry with Cain for his sin, and sent him as a fugitive and vagabond to wander on the earth. [Illustration: ABEL'S SACRIFICE.] THE FLOOD. About fifteen hundred years had passed since Cain slew Abel, during which time man had become more and more wicked. At length God saw "that the wickedness of man was great in the earth, and that every imagination of the thoughts of his heart was only evil continually." Then God said, "I will destroy man whom I have created from the face of the earth." But one man was righteous and served God. His name was Noah. God told him that the world would be drowned by a flood because of the wickedness of the people, and commanded him to build a great ark to float upon the waters. In this ark God promised to preserve alive Noah and his family; and also two of each of every living thing on the earth--animals, birds, and creeping things. All the rest were to die. Noah built the ark as God commanded. It took him a great many years, during which time the people were warned to forsake their sins and turn to God, but they did not do so. At last the ark was finished, and Noah, with his wife, and his sons with their wives, and the animals, birds, and creeping things, as God had commanded, all entered into it. What a long procession it must have been! Then God shut them in, and they dwelt in safety while the rain came down, and the waters rose up and covered the earth. All were drowned except those in the ark. A year afterwards, when the waters were dried up, Noah, and all that had been with him, left the ark. Then Noah built an altar, and offered sacrifices to God, in thankfulness for God's goodness to him and his family. [Illustration: ENTERING THE ARK.] THE TOWER OF BABEL.