"Set your mind on the things above, not on the things that are on earth" (Col 3:1). There is pure "wisdom from above" (Jas 3:17), whereas if it is not from above, it is "earthy, natural, demonic" (:15) "which amounts to idolatry" (Col 3:5). "The one who practices sin is of the devil" (1Jn 3:8). Paul told the Corinthians, "I could not speak to you as spiritual men, but as to men of flesh" (1Co 3:1). "Are you not walking like mere men?" (:3). Disobedience is not restricted just to non-Christians. He even said he would "deliver [one of the brethren] to Satan for the destruction of his flesh, that his spirit may be saved in the day of the Lord Jesus" (5:5). Therefore "deny ungodliness and worldly desires" (Tit 2:12) and "live sensibly, righteously and godly in the present age" (:12). "Keep seeking the things above, where Christ is" (Col 3:1).
The scriptures instruct to set your mind on the things above. But a person might say he is too busy at work needing to support his family. After all, there are laws against talking on a cell phone and driving at the same time. To make matters worse there is disease and depression. You are to keep believing, but could not these extenuating circumstances cause fatigue over time to make it harder and harder to believe? Perhaps an overriding motivation could erase lesser preoccupations. Maybe an all-encompassing world view would make smaller problems not as difficult to handle. If you focus on "the outcome, eternal life" (Ro 6:23) then "the second death has no power" (Rev 20:6). Abraham "without becoming weak in faith" (Ro 4:19) "did not waver in unbelief, but grew strong in faith, giving glory to God" (:20). But you need something significant to believe in to hold your attention. Abraham believed in "the promise of God" (:20). The promise according to Paul is "the gospel which I preached to you, which also you received, in which you stand, by which also you are saved" (1Co 15:1-2). It says that "Christ died for our sins according to the Scriptures, and that He was buried, and that He was raised on the third day" (:3-4). Paul told the Romans that "God displayed [Christ] publicly as a propitiation in His blood through faith. This was to demonstrate His righteousness" (Ro 3:25). "He Himself is the propitiation for our sins, and not for ours only, but also for those of the whole world" (1Jn 2:2). The Tabernacle pictures propitiation. Each part of it represents a facet of salvation. Christ is the sacrifice on the Day of Atonement. It is so "that He might be just and the justifier of the one who has faith in Jesus" (Ro 3:26) "through the redemption which is in Christ Jesus" (:25). You might say that you should set your mind on redemption and justification. "Have this attitude in yourselves which was also in Christ Jesus" (Php 2:5). He "made himself nothing, taking the very nature of a servant" (:7) and "humbled himself and became obedient to death" (:8).