Baptists are split on the specifics of John 3:16. When I was young, and the "Bible" was the KJV, we memorized the verse this way: For God so loved the world that He gave His only begotten Son, so that whosoever believes in Him shall not perish but have everlasting life.
Now, using the results of word study, the verse can be understood exegetically as "God sacrificially loved fallen mankind in this way, He gave His uniquely divine Son so that anyone who believes into Christ shall not perish but have everlasting life."
The above interpretation asks the question, just how does one "believe into Christ?" Answer, when and if God credits an individuals faith in God and His Christ as righteousness, God transfers the individual from the realm of darkness (in Adam) into the kingdom of His Son (in Christ).
Now, using the results of word study, the verse can be understood exegetically as "God sacrificially loved fallen mankind in this way, He gave His uniquely divine Son so that anyone who believes into Christ shall not perish but have everlasting life."
The above interpretation asks the question, just how does one "believe into Christ?" Answer, when and if God credits an individuals faith in God and His Christ as righteousness, God transfers the individual from the realm of darkness (in Adam) into the kingdom of His Son (in Christ).