We belong to the Lord but His gift of FreeWill results in the product of His creation being affected by His creation - man.
Though it is the Lord`s will that all come to repentance and salvation, that will is not manifested because each individual must choose life over death.
The person who has received Christ Jesus as Lord and Saviour has been given EternalLife. However, to the extent that their mind is transformed is the extent to which they DO the will of the Lord in their physical walk and so experience AbundantLife.
Hence, we choose to labour with the Lord in the harvest, or not.
And we choose to cooperate with Him on His plan for our life, or not.
So much for ExtremeSovereignty.