Full Assurance
"That their hearts might be comforted, being knit together in love, and unto all riches of the full assurance of understanding, to the acknowledgement of the mystery of God, and of the Father, and of Christ." (Colossians 2: 2 KJV)
"And we desire that every one of you do shew the same diligence to the full assurance of hope unto the end." (Hebrews 6: 11 KJV)
"Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water." (Hebrews 10: 22 KJV)
"Full assurance" is from a single Greek word, from "plērophoria," which according to Strong, additionally means "certain confidence."
Vine says it denotes "a fullness, abundance," also means "full assurance, entire confidence;" lit., a "full-carrying" (pleros, "full," phero, "to carry"). He says also:
"In Col 2:2, the freedom of mind and confidence resulting from an understanding in Christ; in Hbr 6:11 (AV, "full assurance," RV, "fullness"), the engrossing effect of the expectation of the fulfillment of God's promises; in Hbr 10:22, the character of the faith by which we are to draw near to God."
The Lord wants us to be confident and fully assured of the truth of the gospel. He wants us to be assured of our salvation through Christ and to be free of worry and doubt.
How can we have this "blessed full assurance"? Notice how it is connected with "understanding" of the truth. It is an assurance that has its source in understanding, but also in faith and hope. If we would increase in our assurance, we must increase in our understanding, and in faith, and in hope through the gospel.
Blessed Assurance! Thank you Lord!