The Lord is not slow to fulfill his promise as some count slowness, but is patient toward you, not wishing that any should perish, but that all should reach repentance.
2 Peter 3:9 ESV
Look at Judas. Jesus knew who he was and what he would do. Yet, Jesus spent the time to be with him daily. Gave him an important job in being over the money, even though He knew Judas would take some money for himself. Jesus still showed Judas the same love and friendship that He did with the other disciples. Until that night that Judas betrayed Him, Jesus was still willing to give him the chance to change his mind.
We need to remember the bigger picture and what is important while we are here in this world. There are still more lives to reach while we are on earth. So we need to have His patience to endure what is going on and love those we come in contact with even though it can be hard at times.