Supply

2 Peter 1:5-8 (NASB)

5 Now for this very reason also, applying all diligence, in your faith supply moral excellence, and in your moral excellence, knowledge, 6 and in your knowledge, self-control, and in your self-control, perseverance, and in your perseverance, godliness, 7 and in your godliness, brotherly kindness, and in your brotherly kindness, love. 8 For if these qualities are yours and are increasing, they render you neither useless nor unfruitful in the true knowledge of our Lord Jesus Christ.

Faith is but the beginning of the journey to be one with God. 

Diligence, “1.σπουδάζω means intrans. “to make haste” and is thus closely related to “to be zealous, active, concerned about something.” (TDNT)

Getting attached to the Tree of Life will have little benefit if there is no fruit. Fruit results when we begin tending to the branch of our salvation.