Paul wrote this letter around 49 AD, about 15 years after the death and resurrection of Jesus to churches he founded during his first missionary journey. After Paul left, the Judaizers began teaching the Galatians they must keep the law to be fully Christian. Paul wrote this letter in response.
How can God be one being and yet 3 persons? While not explained explicitly in any passage, the concept of the Trinity is progressively revealed in Scripture. The early church struggled for centuries to understand the doctrine of the Trinity before landing on 3 statements.
In Exodus, God tells the Israelites to keep the Feasts twice: once before the episode with the golden calf and once after. Here’s a summary of the 7 feasts.
The time between the end of the Old Testament (400BC from the prophet Malachi) to the preaching of John the Baptist (25 AD) is known as the “intertestamental” period. Here’s an overview of what happened.
After the death of King Solomon, two of his sons, Rehoboam and Jeroboam, fought for the throne. When Rehoboam harshly raised taxes on the people, the 10 northern tribes rebelled and installed Jeroboam as their king, creating the northern kingdom of Israel. The two southern tribes, Benjamin and Judah, remained with Rehoboam and became the kingdom of Judah.