When one has been baptized by the Holy Spirit, JESUS "dwells in you" (Rm8:9) and you acquire "the mind of CHRIST" (Philippians 2:5) who "Teaches us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly in this present world" (Titus 2:12)!
It's then up to us to "STUDY" (II Timothy 2:15) to "increase our faith" and of course you know "Faith comes by hearing and hearing by the WORD OF GOD" (Romans 10:17) which is how we learn what "sayings" we must "obey!"
As with me, I've had THE SPIRIT tell me AND dream things that I hadn't read in the Bible, so John 16:13 is TRUE when JESUS SAID *HE* would "guide us into all truth!"
When JESUS "dwells in you," believe me HE "brings all things to your remembrance" (John 14:26) because It's HIM "WORKING" (Philippians 2:13) and NOT "you; yourselves" (Ephesians 2:8-9)!
Therefore, with JESUS WORKING, you can rest assure all those who are "IN CHRIST" do "actually obey all of JESUS' sayings" because HE "puts HIS laws in our hearts and minds" (Jeremiah 31:33-34; Hebrews 8:10; 10:16)!