Abraham descendants was to be God’s elected people, they were to be extremely fruitful, they became so fruitful that Pharaoh in Egypt in the period of slavery was afraid that they would be too many and take over the land. Remember this, to have children is a great blessing, God loves the child in spite of you not because of you.
Our life with God is not being a leader; we can be whatever in a church and are called a leader. In the world we might be a leader, but in Gods world we are followers. God said; “Every male among you who is eight days old shall be circumcised” This command was new to Abraham, but for him it was simple, he just found out what it meant and did it. All from 8 days and up was to be circumcised and all means all.