Matthew Poole and continuators on 1 Peter 2:3

3 If so be ye have tasted , that the Lord is gracious .

This doth not imply a doubting, but a supposition, as was before observed, ch. 1.17.

Not lightly tasted by a bare ineffectual Knowledge, as Heb. 6.4. but experienced and perceived by the taste of your spiritual Palate; your spiritual Sense, and Ability to judge of spiritual things being restored to you, with your new Nature in your new Birth. He refers to Psalm 34.8. and possibly to Isa. 66.11.

The Lord Jesus Christ, as appears by the next Verse.

Good, kind, or rather sweet: The same word is applied to Wine, Luke 5.39. The sense of the whole, is, If ye have by Faith received the Gospel as glad Tidings, and worthy of all Acceptation, 1 Tim. 1.15. and therein perceived, and experienced the sweetness of those Consolations which are in Christ Jesus, Phil. 2.1. Or, (which is the same) how sweet he is, who, in the preaching of the Gospel, exhibits himself to your spiritual Senses, to be fed upon, and tasted by you.