Believers are commanded to “Be careful for nothing.” Contextually, the word careful means to be care full or full of cares. That being said, this is one of the most disobeyed commands in all of scripture. In Matthew 6:25, the Lord warned His disciples against dwelling upon or worrying about what they would eat, or drink, or how they would be clothed. The Lord’s rebuke implies that not even the necessities of life should serve as a source of worry for God’s people. It is important to note that worry and faith are at opposite ends of the spectrum because they do not and cannot coexist within the believer’s life and walk. A believer who is “careful” for things cannot and will not simultaneously trust God’s faithful provision. When a believer worries rather than trusting in God’s provision and protection, the believer’s actions deem God incapable to accomplish the matter without the individual contributing his “carefulness.”
Fasting should play a prominent role in the life of a Christian. Just as believers ought to pray, witness, study, and give, we should also fast. In fact, the Lord's words assumed the Christian would fast when He said, “when ye fast” (Matthew 6:16), not IF ye fast. The question was never to be whether or not we would fast, but how we would do so “when” we fast. Fasting was not prominent among the disciples, but the Lord explained that His departure would signify an elevated need for fasting (Mark 2:20). The life of the apostle Paul confirmed this as he said he was “in fastings often” (2 Corinthians 11:27). It was a common practice of Paul’s devotion to the Lord to deprive his flesh of food, drink, and physical pleasures. The Lord not only desired for the early believers to fast, but His people ought to have times of fasting until He returns.
