by. App-104. 1 John 5:1.
water. Referring to His baptism, when witness was given to Him by the voice from heaven and the descent of the Spirit.
Jesus Christ. App-98.
blood. The texts read "in (Greek. en) the blood".
Spirit. App-101.
beareth witness. See 1 John 1:2.
truth. See 1 John 1:6.