The Passover wine, symbolic of the blood of the covenant, is a powerful reminder that God is perfecting us, and it is backed by His absolute trustworthiness to carry it out.. As Paul asks rhetorically in Romans 8:32, He who did not spare His own Son, but delivered Him up for us all, how shall He not with Him also freely give us all things? God has already given the most precious blood that has ever pumped through human veins; will He not also supply whatever else we need? What the Father is most interested in giving us is not material, but spiritual, so we can become just like Him.