People come to Christ for a variety of reasons and under a number of circumstances. Most come to Christ before age 18. After that age it begins to get more difficult. Many adults have freedoms they enjoy that, although condoned by society (drinking, smoking, promiscuity) they are not healthy nor productive. Some adults are stuck in cults and believe they are either already saved, or already worshiping god.
The individuals that find Christ at later ages find Him because He calls them. Some merely seek the truth. Some find no fulfillment in their current “religion.” Others face a crisis that is not acceptable in their cult, or they feel judged as they go through the crisis. Yet others simply see something different and want to understand the contentedness one has in Christ over the tumult and chaos that surrounds natural man.
They all realize Christ is like no other thing man can choose to believe in. Having a personal, loving, familial and cooperative relationship with God is the only way one can be satisfied. In John 3:1-21, Nicodemus finds these truths. A Ruler in Israel thought he was of the chosen people and found his worldly associates mean nothing in eternity. You must be born again into God’s family to be in God’s heavenly home. You must be a family member to be in His Kingdom. That is the challenge in Christianity. All other religions are based on some form of control, Christ invites and accepts what is given. We are family in Christ, only family can be in the Kingdom.