Albert Barnes Commentary 1 Peter 2:3

"if ye have tasted that the Lord is gracious:" — 1 Peter 2:3 (ASV)

If so be ye have tasted that the Lord is gracious. Or rather, as Doddridge renders it, "Since you have tasted that the Lord is gracious." The apostle did not mean to express any doubt on the subject, but to state that, since they had an experiential knowledge of the grace of God, they should desire to increase more and more in the knowledge and love of Him. Regarding the use of the word taste, see the notes on Hebrews 6:4.