“From that time on Jesus began to explain to his disciples that he must go to Jerusalem and suffer many things at the hands of the elders, the chief priests and the teachers of the law, and that he must be killed and on the third day be raised to life.” (Matthew 16 v 21)
From that time on there was one thing that Jesus repeatedly spoke about and that was the purpose of his life. In fact Matthew will record him saying this same thing 3 more times (17:22-23; 20:17-19; 26:2).
Jesus explained that the full weight of the Jewish leadership will be against him; that he must go, he must be killed but that on the 3rd day (always seen as at some point of that day, the 3 days and 3 nights is any portion of that time) be raised to life which obviously indicates that someone else is doing that raising.
From that time on…
From today perhaps?
Focus on what you must do; you must be a disciple, you must carry your own cross, you must follow Jesus.
Settle your mind knowing that whatever opposition or challenges that come against you they will be used for the fulfilling of what you must do.
Acknowledge that there is One who is the raiser of your life and even in your death your ultimate resurrection and as such this purpose will never fail.
Missions Paul 