Holding.

1 Timothy 1:5, 19
The goal of our instruction is the love that comes from a pure heart, a clear conscience, and a sincere faith. . . .

the mystery.

1 Timothy 3:16
By common confession, the mystery of godliness is great: He appeared in the flesh, was vindicated by the Spirit, was seen by angels, was proclaimed among the nations, was believed in throughout the world, was taken up in glory.

2 John 1:9, 10
Anyone who runs ahead without remaining in the teaching of Christ does not have God. Whoever remains in His teaching has both the Father and the Son. . . .