Are you adding to the Gospel

For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life.
John 3:16 NKJV

Why do people add to the Gospel?

What motivates Christians daily?

Resources:

https://96tolife.blogspot.com/search?q=Adding+gospel&m=1

https://www.livinggodministries.net/living_god_ministries/radio_archive/audio_files/galatians_34_who_will_know_5_6_9.mp3