Most people tend to focus on the first part of this verse, but the second part is just as important. But what is exactly a steadfast spirit?
Steadfastness can be defined as: (1) constant in effort to accomplish something; (2) attentive and persistent in doing anything; (3) fixed in direction; (4) firm in purpose, resolution, faith, attachment, etc.. as a person.
2 Peter 3:14-18 tell us to be steadfast in holy conduct (without spot and blameless), godliness, and peace. This can be accomplished by growing in grace and knowledge of Jesus. All of this doesn’t happen overnight though. It’s about being consistent and persistent, one decision at a time; it’s remaining firm even when time and circumstances change. That is a steadfast spirit.
So, may our prayer today echo David’s: Lord, give us a pure heart and renewal of a steadfast spirit. We have a long race to run before we inherit an eternal kingdom. We must not give up, but instead remain persistent, constant and firm in the fact that God is faithful and His promises will indeed one day come to fruition.