White tells us that the Lord Jesus wants to forgive your sins and make you his child.
"Yet to all who received him, to those who believed in his name, he gave the right to become children of God" John 1:12
To receive him means to admit you have sinned and believe that only the Lord Jesus can forgive you.
When you do this God promises to make you his child.
You can do that right now.You can pray in your own words or use this prayer :
"Lord Jesus, I Know I am a sinner and I have done wrong things, I believe you died for me, right now I receive you as my saviour and ask you to forgive my sins. Thank you all this in Jesus Name. Amen"
Now you are God's Child... You can be sure because the Bible(John 1:12) says so.
Now put your name in John 1:12
"To [Your Name] who received him, to [Your Name] who believed in his name, he gave the right to become a child of God"