(from Greek ἀπολογία (Apologia), "speaking in defense" is the religious discipline of defending religious doctrines through systematic argumentation and discourse.

1 Peter 3:15 “Always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect.”

Ask yourself this question:
Why Do I Believe What I Believe?
How would you answer someone who is seeking and wants to know your why?