The definition of religion
: the belief in a god or in a group of gods. : An organized system of beliefs, ceremonies, and rules used to worship a god or a group of gods. : An interest, a belief, or an activity that is very important to a person or group.
If we are to have authentic faith, this is essential advice:
I am reminded of your sincere faith, which first lived in your grandmother Lois and in your mother Eunice and, I am persuaded, now lives in you also. 2 Timothy 1:5
For this reason I remind you to fan into flame the gift of God… 2 Timothy 2:6
He has saved us and called us to a holy life—not because of anything we have done but because of his own purpose and grace. 2 Timothy 1:9