The rainbow symbolized God's mercy and the covenant He made with Noah (representing mankind) not to destroy the world in such a way again. NOT sin, not any kind of pride.
Without a plan in life, a schedule for each day, a goal. We have nothing to look forward to, in all honesty. We have a potential mess and if we are not being led by Christ so that we too as men can lead, then we are not leaders but followers of this earth.
How are you going to build a house with no blueprint, with no plans? Are you just going to hope you like where your bathroom ends up? How do you know you’ll have enough material for your home?