God demands that we take His words seriously, so seriously that we are to live by every one of them, whatever He commands. In Leviticus 23:15, God instructs, "And you shall count for yourselves from the day after the Sabbath, from the day that you brought the sheaf of the wave offering: seven Sabbaths shall be completed." This verse not only teaches how to count Pentecost but also reveals that each of us is responsible for the counting. The phrase "for yourselves" emphasizes that we are to do this counting individually, not relying on a calendar or others to do it for us. Just as we eat unleavened bread ourselves, we must also count Pentecost for ourselves every year. Though this counting may seem like a small thing, we are to live by every word God gives us, not just most of them. God must have a special reason for determining Pentecost by a method different from the other holy days, for which He provides specific dates. Each of us counting Pentecost for ourselves each year may appear unnecessary, yet Christ in Matthew 25:21 shows that being faithful over little things can lead to greater responsibilities. History reveals that ignoring even minor instructions can have grave consequences, underscoring the importance of carefully observing all of God's commands.