"God's purpose is the ground of assurance.
"Here is a sovereign elixir of unspeakable comfort to those who are the called of God. Their salvation rests upon God's purpose. 'The foundation of God stands sure, having this seal. The Lord knows those that are His. And, let everyone that names the name of Christ depart from iniquity,' (2 Tim. 2:19). Our graces are imperfect, our comforts ebb and flow, but God's foundation stands sure. They who are built upon this rock of God's eternal purpose, need not fear falling away; neither the power of man, nor the violence of temptation, shall ever be able to overturn them."