The Period of Slavery in Egypt and the Period of Persecution by the Roman Empire
The period of slavery in Egypt began as a result of Abraham's failure in the offering. During this period Jacob's 12 sons and 70 kinsmen entered Egypt, which represented the satanic world, and their descendants were miserably persecuted by the Egyptians.
The period of the persecution under the Roman Empire began as a result of Israel's disbelief in Jesus. During this period Jesus' 12 disciples, 70 apostles and the early Christians went out into the Roman Empire and also underwent miserable persecution.
In the period of slavery in Egypt, the chosen people of Israel, amidst their 400-year long suffering, performed the rite of circumcision, offered sacrifices and kept the Sabbath. Similarly, the Christians during the period of persecution under the Roman Empire, performed the sacraments of Holy Communion and Baptism, offered the saints as living sacrifices and kept the Sabbath.
After the 400-year period of slavery in Egypt had ended, God chose Moses to subjugate Pharaoh and lead the Israelites to the new land of Canaan. Likewise, at the end of the period of persecution by the Roman Empire, Jesus influenced Emperor Constantine spiritually and moved him to recognize Christianity publicly in 313 AD, and finally could have Christianity declared the national religion by 392 AD In this way, Christians came to be restored, spiritually, into Canaan, out of the satanic world.
After the period of slavery in Egypt, Moses received the Ten Commandments on Mt. Sinai, setting up the core of the Old Testament. By maintaining the tablets of stone, the tabernacle and the ark of the covenant, the First Israel, the chosen nation, came to set up the foundation to receive the Messiah. Likewise, after the period of persecution by the Roman Empire, the Second Israel, the chosen nation, collected the words of the Lord and the records of the apostles and decided on the New Testament and established churches centered on the words, and thus broadened the foundation to receive the Lord of the Second Advent.