You are not even consistent within your own theology. Christ is the Truth. He is NOT a believer.
Furthermore, your theology says they were predestined as believers, not to become believers. You are trying to mix pagan philosophy of predestination into scripture and it does not fit. They are mutually exclusive.
It also does not make sense in how God would predestinate. Since not all humans are then God must use some kind of algorithm to determine who would be predestinated being arbitary. Makes God arbitary and particular. It also denies God's love for all of His creatures. Was Adam and Eve predestined to hell or to believe?
Christ was a believer in God, did He have Faith in God ? He kept the Law of God. In fact one scripture speaking of Christ Im sure, indicated He put His Trust in God Heb 2:12-13
12 Saying, I will declare thy name unto my brethren, in the midst of the church will I sing praise unto thee.
13
And again, I will put my trust in him. And again, Behold I and the children which God hath given me.
He is the author and finisher of our faith if we belong to Him Heb 12:2
2 Looking unt
o Jesus the author and finisher of our faith; who for the joy that was set before him endured the cross, despising the shame, and is set down at the right hand of the throne of God.
Jesus seed will be conformed into a life of Faith