While we worship together on Sundays in a corporate worship sense (with a small "w"), true worship comes from the relationship we live every day and the way we honor our King in our everyday actions (big "W").
"For if we could contol our tongues, we would be perfect and could also control ourselves in every way." What we say matters, and moving deeper into a relationship with God includes using our words well.
What we do matters. Because we are saved and have faith, we do good works. It is not the other way around. Allen digs into the next verses in 2 Peter 1, addressing how we confirm our calling and live out our faith as effective Christians.