J. I. Packer on evangelism

Packer says:

Unconcern and inaction with regard to evangelism are always...inexcusable. And the doctrine of divine sovereignty would be grossly misapplied if we should invoke it in such a way as to lessen the urgency, and immediacy, and priority, and binding constraint, of the evangelistic imperative. No revealed truth may be invoked to extenuate sin. God did not teach us the reality of his rule in order to give us an excuse for neglecting his orders.

Evangelism and the Sovereignty of God. Downers Grove, IL: IVP Books. 2008, p. 41.