So in order to remind other believers of Truth...you and I actually have to remember it ourselves. We actually have to embrace it deep within our guts. Jesus promises the Spirit to help remind disciples of His teachings - so if the Spirit is within us and we're filled with the living word - then remembering and reminding others is not simply a good Christian thing to do, but it's imperative that all believers do it!
In order to remind others of Truth we must remember it ourselves. In order to remember it we must meditate on it daily. If we meditate on it daily we'll plant it deep within our souls. Word planted deep within us transforms us from the inside out. We are made new, new creations with a transformed attitude in line with Christ.
Remember these things...
Die with Christ and so live with Him. Endure struggle and persecution in His name as a reborn disciple and experience the honor of reigning with Christ.
However if we deny Him, if we reject Him, He will deny us and hand us over to what we're actually embracing. If we're faithless in our relationship with Him...He remains faithful, in line with His character and promise...He remains faithful to His people.