You are right there sir. Elijah grew Elisha and he got double of Elijah's anointing. Jesus grew the twelve disciples and today we have the gospel all around. Although, there will always be some that will frustrate our efforts like Gehazi frustrated Elisha's effort while training him and Judas Iscariot did for Christ.
If we don't help others acheive, we might not be fulfilled as well because in their achievements lies our own fulfilment as children of God.