[L]et us draw near with a sincere heart in full assurance of faith, having our hearts sprinkled clean from an evil conscience and our bodies washed with pure water. Let us hold fast the confession of our hope without wavering, for He who promised is faithful.
Fanny J. Crosby
Blessed assurance, Jesus is mine!
O what a foretaste of glory divine!
Heir of salvation, purchase of God,
Born of His Spirit, washed in His blood.
This is my story, this is my song,
praising my Savior all the day long;
this is my story, this is my song,
praising my Savior all the day long.
Perfect submission, perfect delight!
Visions of rapture now burst on my sight;
Angels descending bring from above
Echoes of mercy, whispers of love.
Perfect submission, all is at rest!
I in my Savior am happy and blest,
Watching and waiting, looking above,
Filled with his goodness, lost in His love.
According to Wikipedia,
Crosby was visiting her friend Phoebe Knapp as the Knapp home was having a large pipe organ installed. The organ was incomplete, so Mrs. Knapp, using the piano, played a new melody she had just composed. "What do you think the tune says?" asked Knapp.
"Blessed assurance, Jesus is mine", answered Fanny Crosby.