Because that truly, is all you need to know and remember—HIS Word IS truth. HE IS the Truth (Jn. 14:6). And the the Lord Jesus asked the Father to “sanctify” = set apart” us through His truth.
When we allow that “setting apart” to happen by being one in the Spirit with the Lord Jesus and the Father, we learn to live holy lives we never thought possible before, and only because His righteousness is being allowed to work in us (Titus 3:5).
If we have the truth of God’s Word living and being acted out in our every day lives through faith, hope, humility, obedience, love and trust in Him, we are in an excellent place.
Keep trusting in Him and His Word, for He is forever faithful, and He WILL finish all He started here, for He Himself said it (Isaiah 55:10-11).