Rest

   " So we see that they were not able to enter [into His rest—the promised land] because of unbelief and an unwillingness to trust in God.  Therefore, while the promise of entering His rest still remains and is freely offered today, let us fear, in case any one of you may seem to come short of reaching it or think he has come too late. For indeed we have had the good news [of salvation] preached to us, just as the Israelites also [when the good news of the promised land came to them]; but the message they heard did not benefit them, because it was not united with faith [in God] by those who heard. For we who believe [that is, we who personally trust and confidently rely on God] enter that rest [so we have His inner peace now because we are confident in our salvation, and assured of His power]    [Hebrews 3:19-4:3]

Soooo, if we desire 'rest' (and who doesn't) we need to have inner peace based in confidence and assured of His power.? Does that describe you? Actually, perhaps 'rest' needs defining first - because we all may not define and describe it in the same way. Example: in the Hebrews scriptures the 'rest' is defined as entering the promised land. And rest may use the word goal accomplishment in its description. But 'rest' may refer to something entirely different.

According to: Baker's Evangelical Dictionary of Biblical Theology - (I'm using only the New Testament descriptions of rest as a verb and noun but it is exhaustive )

   "The New Testament. The primary Greek words are the nouns anapausis [ajnavpausi"] and katapausis [katavpausi"], and the verbs anapauo [ajnapauvw] and katapauo [katapauvw].

In the Gospels the theology of rest is most clearly articulated in the words of Jesus: "come to me and I will give you rest and you will find rest for your souls" ( Matt 11:28-30 ). The rest he promises is certainly for the world to come, but it is also for this world. It is the sense of security and peace that flows from a right relation with God, the Father, through obedience to his Son, the Messiah, and membership in his kingdom.    ...

The rest is rightly called a "sabbath rest" because it is a participation in God's own rest. When God completed his work of creation, he rested; likewise when his people complete their service to him on earth, they will enter into God's prepared rest. Now, in this age, the rest is before them as their heritage and by faith they live in the light of it in this world.  ...

In Revelation 14:13-14 the heavenly voice speaks of the blessedness of those who die in the Lord and the Spirit replies: "They will rest from their labor for their deeds will follow them." Here a different dimension of the meaning of rest is being pointed to a rest that is not inactivity but is certainly free of the burdens of the flesh and of the present, evil age.

Finally, we note that as the Spirit of the Lord rests on the Messiah ( Isa 11:2 ), so in the new covenant, "If you [Christian believers] are insulted for the name of Christ, you are blessed, for the Spirit of glory and of God rests on you" ( 1 Peter 4:14 )." 

If you are interested in more study then I recommend:  https://www.biblestudytools.com/dictionary/rest/ 

Now THAT'S what I call a definition! We can read and see that rest is far more encompassing that originally thought by most. And the affects from this rest are far more important. We NEED to rest, to rejuvenate, to let the Lord restore us so we can continue our responsibilities here (and now). Among other things, Rest allows us a time to check, make certain we are doing what we set out to do, integrate any changes that are necessary, double check our perspective, seek the Lord. 

Bottom line is that it is we who choose to do the resting so that we can do the doing. [Oh yes... resting is more than simply taking a nap.]