I cannot read Bastiat without thinking of Corinthians. Both taught to count what is not there. Bastiat taught opportunity cost before the term was coined. The unseen should be accounted for in its absence here now. The empty hand, the worn out shoes, the grumbling tummy. Paul's eternal unseen is also here now, but it is anything but empty. It is the fullness in the absence. Grace you can fail to receive, when the day of salvation is right here now.