Luke 1:1

Overview - Luke 1
The preface of Luke to his whole gospel.
The conception of John the Baptist;
26 and of Christ.
39 The prophecy of Elisabeth and of Mary, concerning Christ.
57 The nativity and circumcision of John.
67 The prophecy of Zacharias, both of Christ,
76 and of John.
Treasury of Scripture Knowledge

Luke 1:1  (King James Version)
Forasmuch as many have taken in hand to set forth in order a declaration of those things which are most surely believed among us,

John 20:31 ; Acts 1:1-3 ; 1 Timothy 3:16 ; 2 Peter 1:16-19

most surely
[Peplerophoremenon,] the passive participle of
[plerophoreo ,] from
[pleres phora,] full measure; and is applied to a ship fully laden, to a tree in full bearing, etc. Hence it implies that fulness of evidence by which any fact is supported, and also that confidence, or feeling of assent, by which facts so supported are believed.