When the children of Israel were delivered from Egypt and were made to wander in the wilderness to learn the commandments of YHWH and also purge out the disobedient from among the people (Num 34:13), the ordinance of the Feast of Tabernacles was given unto them to keep throughout all of their generations. Israel was to remember how the Lord made us to dwell in booths and preserved the righteous safely. However, the unrighteous that chose not to follow after the commandments of YHWH was cut off and failed to enter into the promised land of Israel. We keep the feast to remind us of the severity of keeping the commandments even in this modern wilderness.