It is of immense importance to know the God you serve. It is suicidal to serve an unknown God In fact in it is eternal life to know the true eternal God. By knowing God, I mean His name, His character, His power and everything about Him.
“And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent” – John 17:3
“And you shall know the truth, and the truth shall make you free” -John 8:32
Christ Himself warned His followers: “Take heed that no one deceives you. For many will come in My name. . . and will deceive many” -Matthew 24:4-5.
See from other references in the bible: Matthew 24:11; Acts 20:29-30; 2 Corinthians 11:13-15; 2 Timothy 4:2-4; 2 Peter 2:1-2; 1 John 2:18-26; 1 John 4:1-3).