Jacob knew that God was in charge because God told him He was. When Laban would change the rules, the sheep would change, too. Jacob knew how breeding worked and knew there was no way the sheep could change under his own control. God promised Jacob He would be blessed and Jacob knew his wealth was part of that blessing. Jesus taught a great deal on the dangers of wealth. We start to believe we can do anything and stop acknowledging that everything we have comes from God. He can bless and He can take away, which is always a blessing even though we may not see it that way. God wants us close to Him. But if our wealth is keeping us from Him, He may choose to take it away from us. He owns it all. We are but mere stewards, honored to manage whatever He gives us.