Mark 14:33
NKJV - 33 And He took Peter, James, and John with Him, and He began to be troubled and deeply distressed.
For follow-up discussion and general commentary on the topic. Comments are sorted chronologically.
This is just a speculation but... Could it be that these three disciples most closely exemplified faith, hope, and charity?
I like this speculation. Faith, love and hope. Faith in the finished work on the cross Love for God and others (discipleship and the church) and hope in His second coming when all will be restored.