In John 15:15, Jesus told the Apostles "No longer do I call you servants, for a servant does not know what his master is doing; but I have called you friends, for all things that I heard from My Father I have made known to you."
How do you become Jesus' friend? In the previous verse, Jesus explained "You are My friends if you do whatever I command you." Several times, in Jesus' talk with the Apostles after the Last Supper, He stressed that those who truly love Him will obey His commands. And in John 14:21, He gives the promise "He who has My commandments and keeps them, it is he who loves Me. And he who loves Me will be loved by My Father, and I will love him and manifest Myself to him."
Jesus manifests Himself to Christians who obey Him. Disobedient saints rely on their own wisdom as to what to do; Jesus teaches those who obey Him what to do.