Often, we have some big dream of what is ahead and feel that we have to jump in with both feet immediately in order to accomplish the task. We become impatient and want to make things happen in our timing or in our way. Sometimes, the Lord just says, "Wait." In our obedience, the answer comes. Acts 2 reads, "And when the day of Pentecost was fully come, they were all with one accord in one place. And SUDDENLY there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting... and they were all filled with the Holy Ghost..."
We can only see for a short distance, but God sees the eternal plan. Peter later wrote regarding Jesus' other promise - the promise to return for his church. Some were beginning to doubt that it would ever happen, but Peter admonished them, "The Lord is not slow in keeping his promise, as some understand slowness. He is patient with you, not wanting anyone to perish, but everyone to come to repentance."
God give me the grace to wait on you until my suddenly moment.