God has granted the Christian a soul and a body, as well as the ability to be diligent and to glorify Him with both. Adam, even while in the state of perfection, had physical labor assigned to him. "And the Lord God took the man and put him into the garden of Eden to dress it and to keep it" (Gen. 2:15).
After the fall, it is also God's will that the Christian be diligent and He appoints labor to every Christian. God wills that every Christian not only perform his or her calling but that they do so diligently. Diligence is the exertion of the spiritual and physical abilities of the believer whereby he or she willingly, joyously, and earnestly executes that task which God assigns to them, doing so because it is the will of God.
This virtue only functions for the glory of God in a true believer; the unconverted are diligent in their own way. Their diligence differs as much from the that of believers as life differs from death. The diligence of a natural man proceeds from a perverted heart filled with vices. His or her heart has neither desire nor love for that task as such characteristics are of those in the will of God. Instead, their objective is to earn a living, please people, or to attain some other goal. However, Christian diligence proceeds from a regenerate and believing heart. Christ has reconciled us to the Father. This, in turn, generates love toward God, which motivates one to please the Lord and to accept any task—with joy in performing it.
The diligent will always find something to do for the Lord. A lazy person complains and is unwilling to give forth their best effort. Furthermore, a lazy person is careless. He or she is disorderly and afraid to work. Often you find them simply fiddling around and making excuses for why the work is not being done. They are neither too hot nor too cold when it comes to their task. Sadly, for many, they are just content being lukewarm. This type of sluggard the Lord wished to vomit out of His mouth. Several truths are worth noting here. First, God hates the works of a sluggard. Second, others will despise a sluggard. Third, a sluggard is a burden to his or her self. Proverbs states, "The way of the slothful man is as a hedge of thorns" (Pr. 15:19). Last, laziness is the fountain of all manner of sin. Therefore, be fearful of laziness. If you are lazy in physical matters, you will be lazy in spiritual ones.
In conclusion, God promises His blessing upon the diligent. The Psalmist proclaims, "Let the favor of the Lord our God be upon us, and establish the work of our hands upon us; yes, establish the work of our hands" (Ps. 90:17). Therefore, dear brothers and sisters in Christ, "Whatever you do, work heartily, as for the Lord and not for men, knowing that from the Lord you will receive the inheritance as your reward. You are serving the Lord Christ" (Col.3:23-24).