I believe it takes a lot of faith to obey God, especially undertaking a huge project like building the ark. Obedience, I believe, comes by having a relationship with God or someone. This weeks reading talked about how Noah walked with God. So, out of a relationship, Noah built the ark. He was willing to believe and trust God in whatever God told Him. I obey God by trusting Him and remembering what He has done in the past for me. I know from experience that I can trust God and be willing to do what He asks of me. My obedience comes through faith in Him and knowing Who God is. Faith produces obedience.