Behold, God [is] my salvation,.... Or Saviour; that is, Christ, who is God, the great God, and so fit to be a Saviour, and is one, was appointed by the Father, provided in covenant, promised in the word, sent in the fulness of time, and is become the author of salvation, which a creature could not be; and this the church saw her interest in, and which was the ground of her comfort before declared; and to which she prefixed the word "behold", as a note of asseveration, affirming him to be her Saviour; and of admiration, wondering at it; and of exclusion of all others from being concerned therein; and of attention and direction to others, pointing him out as the only one to look unto.
I will trust, and not be afraid; "trust" in Christ for salvation, be confident of enjoying it, and look upon myself safe and secure from all wrath and condemnation, and from every enemy; and not be "afraid" of sin, Satan, the world, death, hell, and wrath to come.