What was the first of the Seven Laws of Success? Set the right goal! Jesus clearly established the highest-priority goal for His disciples in this verse. He did this because He knows that the main goal, our highest priority, determines the preparations, efforts, and zeal for reaching it.
Suppose someone offered us a tremendous sum of money, perhaps billions of dollars, but the exact amount would be determined by how well we could learn to speak German in two month's time. We would embark on the most intense crash-course program of learning in our life! We would study from morning to night, burn the midnight oil, listen to language tapes, carry flash cards wherever we went, and seek out fluent German-speakers so we could practice with them.
During those two months, no one could drag us near a time-wasting television program. We would probably allow nothing to interfere other than necessary physical activities to sustain life itself. All for money!
Notice what Jesus says earlier in Matthew 6:
Do not lay up for yourselves treasures on earth, where moth and rust destroy and where thieves break in and steal; but lay up for yourselves treasures in heaven, where neither moth nor rust destroys and where thieves do not break in and steal. For where your treasure is, there your heart will be also. (verses 19-21)
Consider these scriptures in the context of what Jesus says in verse 33. Our hearts are in the things to which we devote ourselves, the things we spend our time pursuing. He is helping us prioritize by stating and illustrating principles that will help us make right choices in managing time.
Every day another 24 hours or 1,440 minutes or 86,400 seconds is credited to our account, and we have to spend them. Whether we are a billionaire or a dirt farmer, except for those who die that day, all have the same amount of time. Jesus says how we spend it shows where our heart is.
Of course, Bible Study and prayer are very high priority activities. But Satan also knows this! He also knows it would be very difficult to change our minds regarding their value if he confronted us directly. So he makes use of subtle, indirect approaches, and all too often he succeeds in diverting our attention from these high priority concerns.