Following Jesus must be done one day at a time. Jesus told us we shouldn’t worry about tomorrow because today has enough trouble of its own (Matthew 6:31-34). In Proverbs, Agur prayed for just enough provision for today, not for a month, a year, or a lifetime (Proverbs 30:8). Agur was a wise man, so if his advice was to focus only on the day ahead of us, that should probably good enough for us. But when Jesus says it, then as His disciples, we must live as He says.
As you study the life of Christ, you see a man who took each day as it came. He was never in a rush and never harried. He spent each day dealing with whatever situation was presenting itself. The only long-term agenda He seemed to have was obeying His Father. Everything else was dealt with as it came.