Colossians 2:1-4

For I want you to know how great is my solicitude for you [how severe an inward struggle I am engaged in for you] and for those [believers] at Laodicea, and for all who [like yourselves] have never seen my face and known me personally. [For my concern is] that their hearts may be braced (comforted, cheered, and encouraged) as they are knit together in love, that they may come to have all the abounding wealth and blessings of assured conviction of understanding, and that they may become progressively more intimately acquainted with and may know more definitely and accurately and thoroughly that mystic secret of God, [which is] Christ (the Anointed One). Colossians 2:1-2

Remember that the secret just isn’t Christ, it is Christ in you. So how do we get the assured conviction of understanding that it is Christ in us? 

Now may the God Who gives the power of patient endurance (steadfastness) and Who supplies encouragement, grant you to live in such mutual harmony and such full sympathy with one another, in accord with Christ Jesus, That together you may [unanimously] with united hearts and one voice, praise and glorify the God and Father of our Lord Jesus Christ (the Messiah). Romans 15:5-6

But you have been anointed by [you hold a sacred appointment from, you have been given an unction from] the Holy One, and you all know [the Truth] or you know all things. 1 John 2:20

The Truth is that we can’t do anything on our own to become convinced of the Truth that will set us free, it has to be our Father. Our Father has to give us the full understanding that His Anointing abides permanently within us. 

In Him all the treasures of [divine] wisdom ([comprehensive insight into the ways and purposes of God) and [all the riches of spiritual] knowledge and enlightenment are stored up and lie hidden. I say this in order that no one may mislead and delude you by plausible and persuasive and attractive arguments and beguiling speech. Colossians 2:3-4

But the Comforter (Counselor, Helper, Intercessor, Advocate, Strengthener, Standby), the Holy Spirit, Whom the Father will send in My name [in My place, to represent Me and act on My behalf], He will teach you all things. And He will cause you to recall (will remind you of, bring to your remembrance) everything I have told you. John 14:26

So don’t beat yourself up if you aren’t fully convinced. It is not your responsible to convince yourself. It is our Father’s responsibility to convince you!