And beside this - Notwithstanding what God hath done for you, in order that ye may not receive the grace of God in vain;
Giving all diligence - Furnishing all earnestness and activity: the original is very emphatic.
Add to your faith - Επιχορηγησατε· Lead up hand in hand; alluding, as most think, to the chorus in the Grecian dance, who danced with joined hands. See the note on this word, 2 Corinthians 9:10 ; (note).
Your faith - That faith in Jesus by which ye have been led to embrace the whole Gospel, and by which ye have the evidence of things unseen.
Virtue - Αρετην· Courage or fortitude, to enable you to profess the faith before men, in these times of persecution.
Knowledge - True wisdom, by which your faith will be increased, and your courage directed, and preserved from degenerating into rashness.